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05: Finding the 2nd highest number in an array in Java

Requirements gathering

  1. Does the array allow duplicates?
  2. If duplicates are allowed, then do you need to report duplicates? For example, in {2,4, 6, 3, 6, 5}, is 6 or 5 the second highest?

…

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08: Write code to add, subtract, multiply, and divide given numbers?

A trivial coding example (i.e. a Calculator) tackled using the following programming paradigms in Java not only to perform well in coding interviews, but also to learn these programming paradigms.

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17 Java coding tips for job interviews and pre-interview coding tests

Java coding questions are very common in job interviews. Good coding skills are essentials for passing the peer code reviews with flying colors. Here are 17 coding tips with Java examples.

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Fibonacci number

Q1. Can you write a function to determine the nth Fibonacci number? The Fibonacci numbers under 2000 are : 0, 1, 1, 2, 3, 5, 8, … Read more ›...

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Fibonacci number with caching and Java 8 FP

Complimenting Fibonacci number coding – iterative and recursive approach, we can improve performance by caching. If you run this Output and you can see “fibonacci(3)” … Read more ›...

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Find 2 numbers from an array that add up to the target

Q1. Given an array of integers, find two numbers such that they add up to a specific target number? For example, Given numbers: {2, … Read more ›...

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Find the first non repeated character in a given string input

Pseudocode 1) Precodnition check for null or empty input. 2) Loop throught the input string, and store each “character” as a key in a map with the value being the...

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Finding the missing numbers Java example

Q. Can you write code to identify missing numbers in a given array of numbers?

Solution 1: Assuming that the given numbers are in order

Output:

The above solution assumes that the numbers are in order (i.e.

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Finding the perfect number

Q. Can you write code to output the perfect number between a given range? Definition: A perfect number is a positive integer that is equal to the sum of its...

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Fizz Buzz

Q1. Write a program that prints numbers from 1 to 30, but for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”....

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300+ Java & Big Data Interview FAQs

300+ Java Interview FAQs
Java FAQs - 01: Prepared?
(2)
12 things to know about job interviews
How to prepare to succeed in Java job interviews?
Java FAQs - 02: Ice Breaker
(6)
04: Can you think of a time where you ...?
07: 20+ Pre interview refresher on tools
10+ Know your industry Q&As
4 Ice breaker Java interview Q&As asked 90% of the time
8 real life Java scenarios with Situation-Action-Result (i.e. SAR) technique
8 real life Scenarios of SAR technique - Part 2
Java FAQs - 03: Core Java
(13)
00: Top 50+ Core Java interview questions answered - Q1 to Q10
00: Top 50+ Core Java interview questions answered - Q11 to Q23
00: Top 50+ Core Java interview questions answered - Q24 to Q36
00: Top 50+ Core Java interview questions answered - Q37 to Q42
00: Top 50+ Core Java Interview questions answered - Q43 to Q54
02: 10 Java String class interview Q&As
02: 5 Java multithreading scenarios interview
15+ Java beginner multithreading interview FAQs
17 FAQ Java Collection interview Q&As
6 Java Modifiers every interviewer likes to Quiz you on
9 Java Garbage Collection interview questions & answers
Java Generics in no time "? extends" & "? super" explained with a diagram
Q1 - Q10 Java OOPs interview Q&As
Java FAQs - 04: OOP & FP
(4)
01: 19 Java 8 Functional Programming FAQs
5 FAQs on transforming your thinking from OOP to FP
Q1 - Q10 Java OOPs interview Q&As
Why favour composition over inheritance?
Java FAQs - 05: JEE
(12)
01: 12 Web basics every Java web developer must know - Part 1
02: JavaScript mistakes interview Q&As
03: 21+ Java Servlet interview Q&As
04: 7 JSP interview questions and answers
06: Web design patterns MVC2, MVP, MVVM & MVW
12 FAQ JDBC interview Q&As
12 Web basics every Java web developer must know – Part 2
8 JEE (i.e. Java EE) Overview interview Q&As
9 JNDI and LDAP interview Q&A
Client-side & Server side view technologies Q&As
Q01-Q28: Top 50+ FAQ JEE interview Q&As
Q29-Q53: Top 50+ FAQ JEE Interview Q&As
Java FAQs - 06: Spring
(8)
01: Q01 - Q07 Spring core interview Q&As
01: Spring DI & IoC interview Q&As
01b: Q08 - Q13 Spring interview Q&As
04 17 Spring bean life cycles & scopes FAQs
05: 9 Spring Bean scopes interview Q&A
11 Spring MVC Interview Q&As
15 Spring Boot interview Q&As
Spring Cloud Microservices interview Q&As
Java FAQs - 07: Hibernate
(4)
8 Hibernate interview Q&As
8 JPA interview questions and answers
Hibernate First & second level cache interview Q&As
Q08 - Q15 Hibernate interview Q&As
Java FAQs - 08: Web Services
(6)
01: 7 must know Java Web Services Interview Q&As
01: Q13 "12 Rules" for REST API design & development
02: 6 Java RESTful Web services Interview Q&As
05: REST Service URI conventions with Spring MVC
06: RESTful Web services and HATEOAS Q&A
09: 11 SOAP Web service interview Q&As
Java FAQs - 09: Microservices
(7)
01: Q07 - Q12 Java Micro & Web services Interview Q&As
03: Kubernetes (i.e. Minikube) - deploy a spring boot microservice app
10+ Domain Driven Design (i.e. DDD) Interview Q&As
10+ Key Microservices Interview Questions Answered
15 Spring Boot interview Q&As
Event sourcing & CQRS interview Q&As
Spring Cloud Microservices interview Q&As
Java FAQs - 10: Messaging
(2)
16 FAQ JMS interview Q&As
7 Apache Kafka architecture interview Q&As
Java FAQs - 11: Architecture
(5)
01: 7+ Java architectural patterns interview Q&As - Part 1
02: 7+ Java architectural patterns interview Q&As - Part 2
03: 7+ Java architectural patterns interview Q&As - Part 3
03: How would you go about designing an online shopping cart?
04: How to go about designing a medium size JEE app?
Java FAQs - 12: RDBMS
(2)
10 ERD (Entity-Relationship Diagrams) Interview Q&As
15 Database design interview Q&As
Java FAQs - 13: SQL
(4)
14+ SQL beginner interview Q&As
15+ SQL optimisation interview questions & answers with scenarios
15+ SQL scenarios based interview Q&As - part 1
15+ SQL scenarios based interview Q&As - Part 2
Java FAQs - 14: Code Quality
(4)
30+ Java Code Review Checklist Items
5 Java unit testing interview Questions and Answers
8+ JMeter performance testing interview Q&As
Ensuring code quality in Java Q&As
Java FAQs - 15: Key Areas
(15)
02: 15 key considerations for low latency Java
12 Java design patterns interview Q&As
15 Security key area interview Q&A for Java developers
18 Agile Development interview Q&A for Java developers
4 FAQ Performance tuning in Java interview Q&As
4 JEE Design Patterns Interview Q&As
5 Java concurrency management interview Q&As
6 Scaling your Java applications interview Q&As
8 Java memory management interview Q&As
9 Java Transaction Management Interview Q&As
Design pattern intents interview Q&A
Flyweight design pattern to improve memory usage & performance
Monitoring/Profiling Java applications interview Q&A
QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability - Non Functional Requirements
Top 10 causes of performance issues in Java
Java FAQs - 16: UML
(1)
12 UML interview Q&As
Java FAQs - 17: GIT
(4)
01: 12+ Git Source control must know basics interview Q&As
02: 6 More Git interview Q&As
03: Understanding Git terms origin, master, and head
04: Git Merging Vs rebasing interview questions and answers
Java FAQs - 18: Unix
(3)
01: 14 Unix must-know interview Q&As
02: Top 10 Linux interview Q&As
03: Shell script interview Q&As for Java developers
Java FAQs - 19: DevOps
(4)
17+ DevOps CI/CD Jenkins interview Q&As
21 Docker DevOps interview Q&As
4 DevOps interview Q&As
DevOps Kubernetes (aka K8s), Docker & Microservices Q&As
Java FAQs - 20: AWS
(5)
01: AWS Q&As on VPC, Subnets, Availability Zones, VPN, Route tables, NACLs & Security Groups
02: AWS Identity & Access Management (i.e. IAM) interview Q&As
15 EC2 instances interview Q&As
15+ AWS Services overview interview Q&As
18 Amazon S3 interview Q&As
Java FAQs - 21: Maven
(1)
01: 12 Maven interview Questions & Answers
Java FAQs - 22: Regex
(2)
8 Regular Expressions (aka Regex) by examples for Java developers
Regular Expressions interview Q&As for Java developers
Java FAQs - 23: JSON & XML
(3)
17 XML basics interview Q&As
6 JSON interview Q&As
YAML with Spring & Java Q&As
Java FAQs - 24: JMeter
(2)
8+ JMeter performance testing interview Q&As
JMeter for performance testing REST services with BeanShell
300+ Big Data Interview FAQs
Big Data - 01: SQL
(12)
14+ SQL beginner interview Q&As
15+ SQL optimisation interview questions & answers with scenarios
15+ SQL scenarios based interview Q&As - part 1
15+ SQL scenarios based interview Q&As - Part 2
15+ SQL scenarios based interview Q&As – Part 3
18 SQL best practices interview Q&As
Common Table Expressions (i.e. CTE) in SQL using the "WITH" clause
SQL analytic functions interview questions - Part 1
SQL analytic functions interview questions - Part 2
SQL analytic functions interview questions - Part 3
SQL querying Temporal tables & SCD Type 2
SQL retrieving the latest records interview Q&As
Big Data - 02: Data Modelling
(12)
00: 13 Data Warehouse interview Q&As - Fact Vs Dimension, CDC, SCD, etc - part 1
00: 13 Data Warehouse interview Q&As - Fact Vs Dimension, CDC, SCD, etc - part 2
03: Databricks - Spark SCD Type 1
04: Databricks - Spark SCD Type 2
04a: Databricks – Spark SCD Type 1 with Merge
04b: Databricks – Spark SCD Type 2 with Merge
05: Q37-Q41 - Data lake & metadata interview Q&As
10 ERD (Entity-Relationship Diagrams) Interview Q&As
Apache Hive for Slowly Changing Dimension (i.e. SCD) interview Q&As
Canonical Data Model (i.e. CDM) interview Q&As
Data categories in Data warehouse & Data lake
SQL querying Temporal tables & SCD Type 2
Big Data - 02: Data Warehouse
(4)
00: 13 Data Warehouse interview Q&As - Fact Vs Dimension, CDC, SCD, etc - part 1
00: 13 Data Warehouse interview Q&As - Fact Vs Dimension, CDC, SCD, etc - part 2
05: ETL & ELT architecture interview Q&As
Straight Through Processing, OLTP, Data warehousing & OLAP
Big Data - 03: Big Data
(7)
00: Data Lake Vs. Data Warehouse Vs. Delta Lake
00: Q1 - Q6 Hadoop based Big Data architecture & basics interview Q&As
01: Lambda, Kappa & Delta Data Architectures Interview Q&As - Overview
02: Q7 - Q15 Hadoop overview & architecture interview Q&As
08: Q71 - Q75 ETL/ELT on BigData Interview Q&As
10 Distributed storage & computing systems interview Q&As
16: Q114 - Q115 CAP theorem interview Q&As
Big Data - 04: Hadoop
(5)
07: Q62 - Q70 HDFS blocks Vs. splits & Spark partitions Interview Questions & Answers
11: Q88 - Q91 Read-Write Vs Append-Only File Systems
12: Q92 - Q97 Hadoop file formats and how to choose
18: Q121 - Q124 Choosing between HDFS & AWS S3 for BigData projects interview Q&As
More HDFS & NameNode interview Q&As
Big Data - 05: MapReduce
(1)
03: Q16 - Q26 Hadoop MapReduce interview questions & answers
Big Data - 06: Hive
(6)
09: Q76– Q88 Apache Hive partitioning, bucketing, map join, skewed data, vectorization & denormalization interview Q&As
10 Apache Hive scenarios interview Q&As on backup, repair, partition, drop, etc
13: Q98 - Q104 Apache Hive Basics Interview questions & answers
Apache Hive for Slowly Changing Dimension (i.e. SCD) interview Q&As
Q01 - Q07 Scenarios Based Hive Interview Q&As
Q08- Q12 Scenarios Based Hive Query Language (i.e. HQL) Interview Q&As
Big Data - 07: Impala
(1)
10+ Apache Impala Interview Q&As
Big Data - 08: Spark
(28)
00: Apache Spark eco system & anatomy interview Q&As
02: Cleansing & pre-processing data in BigData & machine learning with Spark interview Q&As
12 Apache Spark getting started interview Q&As
14: Q105 - Q108 Spark "map" vs "flatMap" interview questions & answers
15: Q109 - Q113 Spark RDD partitioning and "mapPartitions" interview questions & answers
17: Spark interview Q&As with coding examples in pyspark (i.e. python)
40+ Apache Spark best practices & optimisation interview FAQs - Part-1
40+ Apache Spark best practices & optimisation interview FAQs - Part-2
40+ Apache Spark best practices & optimisation interview FAQs – part 03: Partitions & buckets
5 Spark streaming & Apache storm Interview Q&As
6 Delta Lake interview questions & answers
8 Apache Spark repartition Vs. coalesce scenarios interview Q&As
8 Spark streaming interview Q&As
Apache Spark SQL join types interview Q&As
Debugging Spark applications written in Java locally by connecting to HDFS, Hive and HBase
Spark interview Q&As with coding examples in Scala - part 01: Key basics
Spark interview Q&As with coding examples in Scala – part 02: partition pruning & column projection
Spark interview Q&As with coding examples in Scala – part 03: Partitioning, pruning & predicate push down
Spark interview Q&As with coding examples in Scala – part 04: Memory considerations, lazy computation & cacheing
Spark interview Q&As with coding examples in Scala – part 05: Transformations, actions, pipelining & shuffling
Spark interview Q&As with coding examples in Scala – part 06: groupBy, collect_list & explode
Spark interview Q&As with coding examples in Scala – part 07: map, flatMap, mapPartitions & mapValues
Spark interview Q&As with coding examples in Scala – part 08: pivot, unpivot, agg & selectExpr
Spark interview Q&As with coding examples in Scala – part 09: sql.functions
Spark interview Q&As with coding examples in Scala – part 10: adding new columns
Spark interview Q&As with coding examples in Scala – part 11: add column values conditionally, lit & typedlit
Spark join strategies & performance tuning interview Q&As
Spark understanding DAG for tuning performance interview Q&As
Big Data - 09: Spark SQL
(4)
06: Learn how to access Hive from Spark via SparkSQL & Dataframes by example
10 Spark SQL Interview Q&As
17: Spark interview Q&As with coding examples in pyspark (i.e. python)
Apache Spark SQL join types interview Q&As
Big Data - 10: Apache Kafka
(1)
7 Apache Kafka architecture interview Q&As
Big Data - 11: Data Governance
(2)
05: Q37-Q41 - Data lake & metadata interview Q&As
Big Data - governance & metadata management interview Q&As
Big Data - 11: NoSQL
(2)
06: Q51 - Q61 HBase Interview Questions & Answers
10: Q80 - Q87 HBase Schema Design Interview Q&As
Big Data - 12: Data security
(3)
12 Kerberos interview Q&As
6 LDAP Interview Q&As
Big Data - governance & metadata management interview Q&As
Big Data - 13: Analytics & Science
(6)
01: Q01 - Q07 General Big Data, Data Science & Data Analytics Interview Q&As
02: Cleansing & pre-processing data in BigData & machine learning with Spark interview Q&As
03: Simple Linear Regression interview Q&As
04: Residuals, Cost/Loss functions, R-squared & Gradient Descent interview Q&As
05: Linear regression outputs, null hypothesis, t-test & p-value interview Q&As
What do data analysts, engineers & scientists do?
Big Data - 14: AWS
(13)
01: AWS Q&As on VPC, Subnets, Availability Zones, VPN, Route tables, NACLs & Security Groups
02: AWS Identity & Access Management (i.e. IAM) interview Q&As
12 Amazon Redshift interview Q&As
15 EC2 instances interview Q&As
15+ AWS Services overview interview Q&As
18 Amazon S3 interview Q&As
18: Q121 - Q124 Choosing between HDFS & AWS S3 for BigData projects interview Q&As
21: Q138 - Q142 AWS data lakes overview Interview Q&As
5 Amazon EMR Vs. Cloudera interview Q&As
Amazon Athena, Redshift, Redshift spectrum & Presto Q&As
AWS Data pipeline architecture interview Q&As
AWS Web Application Security Q&As
Multi-tenant Architecture Interview Q&As
Big Data - 15: Sqoop & Nifi
(3)
05: Q37 – Q50 Apache Flume interview questions & answers
10+ Apache NiFi interview Q&As
13 Apache Sqoop interview Q&As
Big Data - 16: Yarn, Zookeeper
(4)
19: Q125 - Q130 Apache Zookeeper interview Q&As
20: Q131 - Q137 FAQ Apache Solr with HDFS interview questions & answers
5 Apache YARN interview Q&As
Finding your way around YARN and Spark on Cloudera
150+ Java Architect interview FAQs
Architecture - Patterns
(10)
01: 7+ Java architectural patterns interview Q&As - Part 1
01: Q07 - Q12 Java Micro & Web services Interview Q&As
02: 7+ Java architectural patterns interview Q&As - Part 2
03: 7+ Java architectural patterns interview Q&As - Part 3
03: How would you go about designing an online shopping cart?
04: How to go about designing a medium size JEE app?
06: Web design patterns MVC2, MVP, MVVM & MVW
10+ Key Microservices Interview Questions Answered
8 JEE (i.e. Java EE) Overview interview Q&As
Multi-tenant Architecture Interview Q&As
Architecture - How to
(9)
01: 12 Web basics every Java web developer must know - Part 1
02: HTTP basics on headers, MIME types, & cookies for Java developers
03: How would you go about designing an online shopping cart?
12 Web basics every Java web developer must know – Part 2
18 Java scenarios based interview Q&As for the experienced - Part 1
18 Java scenarios based interview Q&As for the experienced - Part 2
3 key "How would you go about ..." Q&As to judge Java experience
How to become a software architect?
SDLC process interview Q&As
Architecture - AWS
(8)
01: AWS Q&As on VPC, Subnets, Availability Zones, VPN, Route tables, NACLs & Security Groups
02: AWS Identity & Access Management (i.e. IAM) interview Q&As
15 EC2 instances interview Q&As
15+ AWS Services overview interview Q&As
18 Amazon S3 interview Q&As
AWS Data pipeline architecture interview Q&As
AWS Web Application Security Q&As
Multi-tenant Architecture Interview Q&As
Architecture - Distributed
(7)
10 Distributed storage & computing systems interview Q&As
10+ Key Microservices Interview Questions Answered
19: Q125 - Q130 Apache Zookeeper interview Q&As
5 Spark streaming & Apache storm Interview Q&As
9 Java Transaction Management Interview Q&As
Event sourcing & CQRS interview Q&As
Spring Cloud Microservices interview Q&As
Architecture - Microservices
(6)
01: Q07 - Q12 Java Micro & Web services Interview Q&As
01: Q13 "12 Rules" for REST API design & development
10+ Domain Driven Design (i.e. DDD) Interview Q&As
10+ Key Microservices Interview Questions Answered
QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability - Non Functional Requirements
Spring Cloud Microservices interview Q&As
Architecture - QoS
(1)
QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability - Non Functional Requirements
Architecture - ERD
(1)
10 ERD (Entity-Relationship Diagrams) Interview Q&As
Architecture - ETL
(2)
05: ETL & ELT architecture interview Q&As
08: Q71 - Q75 ETL/ELT on BigData Interview Q&As
Architecture - Low Latency
(6)
01: 13 Java low latency interview questions & answers
02: 15 key considerations for low latency Java
03: Java GC tuning for low latency applications
1. Asynchronous processing in Java real life examples - part-1
2. Asynchronous processing in Java real life examples - part-2
Why acquire skills & experience in low latency & Big Data? What specific skills are required?
Architecture - UML
(1)
12 UML interview Q&As
100+ Companion Tech Interview FAQs
Companion - Angular JS
(3)
9 AngularJS 1.x interview Q&As
9+ AngularJS 1.x Interview Q&As
AngularJS 1.x with Spring MVC RESTful web service beginner tutorial in 14 steps
Companion - Domain Knowledge
(3)
12+ FX or Forex Trading questions & answers
15 Banking & finance domain knowledge interview Q&As
Accounting domain knowledge on Credits Vs Debits interview Q&As
Companion - FIX
(2)
20+ FIX basics interview questions and answers
Finding your way around the FIX specification Q&A
Companion - Git & SVN
(6)
01: 12+ Git Source control must know basics interview Q&As
02: 6 More Git interview Q&As
03: Understanding Git terms origin, master, and head
04: Git Merging Vs rebasing interview questions and answers
05: Git & Maven for releasing software artifacts Q&A
Setting up Cygwin with Git Tutorial
Companion - Groovy
(7)
20 Groovy closure interview Q&As with examples
9 Groovy meta programming interview Q&As
Cash balance Groovy coding questions & answers
Groovy method chaining for DSL explained
Q1 - Q5 Groovy basics interview Q&A
Q6 - Q10 Groovy basics interview Q&A
Sum grades Groovy coding questions & answers
Companion - JavaScript
(6)
01: JavaScript Vs Java interview Q&As
02: JavaScript mistakes interview Q&As
Q1 - Q10 JavaScript Q&As on scopes & context
Q11 – Q20 JavaScript Q&As on "this"
Q21 – Q30 JavaScript Q&As on self-invoking & argument
Q31 – Q37 JavaScript Interview Q&A on Closure
Companion - JMeter
(2)
8+ JMeter performance testing interview Q&As
JMeter for performance testing REST services with BeanShell
Companion - Maven
(3)
01: 12 Maven interview Questions & Answers
02: 7 More Maven interview Questions & Answers
05: Git & Maven for releasing software artifacts Q&A
Companion - NoSQL
(3)
10: Q80 - Q87 HBase Schema Design Interview Q&As
3. Understanding HBase (NoSQL) database basics in 7 steps
9 Java Transaction Management Interview Q&As
Companion - Regex
(2)
8 Regular Expressions (aka Regex) by examples for Java developers
Regular Expressions interview Q&As for Java developers
Companion - SQL
(18)
10: Getting started with MySQL database beginner tutorial
14+ SQL beginner interview Q&As
15 Database design interview Q&As
15+ SQL optimisation interview questions & answers with scenarios
15+ SQL scenarios based interview Q&As - part 1
15+ SQL scenarios based interview Q&As - Part 2
15+ SQL scenarios based interview Q&As – Part 3
18 SQL best practices interview Q&As
Auditing database record changes in Oracle
Common Table Expressions (i.e. CTE) in SQL using the "WITH" clause
Deleting records in SQL Interview Questions and Answers
SQL analytic functions interview questions - Part 1
SQL analytic functions interview questions - Part 2
SQL analytic functions interview questions - Part 3
SQL querying Temporal tables & SCD Type 2
SQL retrieving the latest records interview Q&As
SQL Subquery interview questions and answers
Transaction management in SQL -- Sybase example
Companion - Unix
(16)
01: 14 Unix must-know interview Q&As
02: Top 10 Linux interview Q&As
03: Shell script interview Q&As for Java developers
12 SSH interview Q&As
5 curl vs wget interview Q&As
Hidden Unix, Git & SVN config files
sed and awk to write shell scripts for Java developers
Unix - combining two or more files & output only a subset of columns
Unix - Convert csv to psv without removing commas within quotes
Unix - Working with SQL files
Unix history commands for Java developer productivity
Unix remoting interview Q&A for Java developers
Unix sed & awk commands in action
Unix Sed commands for Java developers
Unix shell script to upload & download data between HDFS and edge node
What does this Unix code snippet do?
Companion - JSON
(2)
6 JSON interview Q&As
JSON, Jackson, and Maven example
Companion - XML
(2)
17 XML basics interview Q&As
XML Processing Interview Q&A
Companion - XSD
(2)
11 FAQ XSD interview questions and answers
XSD reuse interview questions and answers
Companion - YAML
(2)
YAML with Java using the SnakeYaml library tutorial
YAML with Spring & Java Q&As
250+ Scala & Python Interview FAQs
Python 100+ FAQs
(24)
01: Python Iterators, Generators & Decorators Tutorial
02: Python comprehensions tutorial
03: Python context manager tutorial
04: In Python functions are objects tutorial
05: Python debugging tutorial
06: Object introspection in Python tutorial
07: Python dictionary tutorial
08: Python Data modelling tutorial - Dunder or Magic Methods
09: Python working with String tutorial
10: Python working with collections tutorial
11: Python *args and **kwargs tutorial
12: Python enumerate vs zip tutorial
13: Python working with files tutorial
14: Python Closures, Partial functions and Currying tutorial
15: Python multithreading tutorial
16: Python multithreading producer/consumer & semaphores tutorial
17: Python OOP and @property decorator tutorial
18: Python Abstract Base Classes (i.e. ABC) tutorial
19: Python operator overloading tutorial
20: Python function overloading tutorial
21: Python function overriding tutorial
22: Python Duck typing tutorial
23: Python coding questions - magic method, generator & debugging
24: Python coding questions – part 2
Scala 140+ FAQs
(35)
01: Scala Functional Programming basics - pure functions, referential transparency & side effects
02: Scala FP basics: First-class function, higher order function, statements Vs expressions, immutability & recursion
02B: Scala FP basics: Explain the below Scala code
03: Q1 - Q6 Scala interview Q&As on Functional Programming
04: Currying, partial application & functional composition in Scala
04: Q6 - Q12 Scala FP currying, closures & partial functions interview Q&As
05: Q13 – Q18 Scala FP combinators interview questions & answers
05: Q27 - Q32 Scala idioms Q&As on Option-Some-None, Try-Success-Failure and Either-Left-Right
06: Scala Class Vs. Object and Companion object interview Q&As
06C: Q33 – Q40 Scala Futures and Promises Interview Q&As
07: Q41 - Q48 Scala Async and Actor System Interview Q&As
07: Scala Factory Method Pattern & Trait Vs Abstract classes
08: Q19 - Q26 Scala Data Structures basics interview questions & answers
08: Q49 - Q58 Scala Implicits Interview Q&As
09: Q59 - Q65 Higher Order Functions in Scala Interview Q&As
10: Q66 - Q70 Pattern matching in Scala Interview Q&As
11A: Scala values, proper types, first order types & higher kinded types
11B: Q71 - Q72 - Scala type parameterization & variance interview Q&As
11C: Q73 - Q77 - Scala type parameterization & variance interview Q&As
11D: Scala existential type interview Q&As
12: Q78 - Q80 Recursion in Scala Q&As explained with diagrams
13A: Scala Semigroup interview Q&As
13B: Q81 - Q83 Scala monoids interview Q&As
13B: Scala foldLeft, foldRight, scanLeft, scanRight, reduceLeft, reduceRight, etc are Monoids
14: Q84 - Q87 Category Theory With Scala Interview Q&As
15: Q88 – Q92 Scala Functors Interview Q&As
15B: Scala Functors Interview Q&As by example
16: Q93 – Q98 Scala monads interview Q&As
17: Q99 – Q103 Scala applicative functors interview Q&As
18: Q104 - Q108 Scala typeclass pattern for decoupling with polymorphism
19: Q109 - Q113 Scala ADT (Algebraic Data Types) Interview Q&As
20: Q114 – Q120 Scala fold vs reduce Q&As
21: Q121 - Q124 Scala Extractor Interview Q&As
22: What are the uses of underscore i.e _ in Scala?
23: Scala Traits, Mixins, self-type annotation & DI with Cake pattern
Scala way of coding
(22)
01: Coding "Java way in Scala" Vs "Scala way in Scala"
02: Coding Scala Way - Recursion & Iterator in FP
03: Coding Scala Way – Lazy Eval
04: Coding Scala Way – Null checks with Option-Some-None
05: Coding Scala Way - FP concepts
06: Coding Scala Way - Reduce & Compose functions
07: Coding Scala Way – Regular Expressions
08: Coding Scala Way - Recursion & Higher Order Function
09: Coding Scala Way - Fibonacci Series
10: Coding Scala Way - groupBy, mapValues & identity
11: Coding Scala Way - Actors with Akka - part 1
12: Coding Scala Way - Actors with Akka "Ask Pattern" - Part 2
13: Coding Scala Way - 2 Actors with Akka - part 3
14: Coding Scala Way – Scala concurrency with Future
15: Coding Scala Way – Scala concurrency & closure vs function definition
16: Coding Scala Way – Scala concurrency styles
17: Coding Scala Way - What is wrong with this code?
3 Reasons Why I started Learning Scala
FAQs Data: 01: Getting started with Spark Scala on IntelliJ IDEA
FAQs Data: 02: Getting started with Spark Scala on IntelliJ IDEA with Maven
FAQs Data: 03: ScalaTest using IntelliJ IDEA IDE
FAQs Data: 04: ScalaTest of Spark using IntelliJ IDEA IDE
80+ Java Code Quality Q&As
Code Quality - Automation
(1)
Selenium and Web Driver Interview Questions and Answers
Code Quality - Code Coverage
(2)
Jacoco for unit test coverage with SonarQube tutorial
Maven and Cobertura Tutorial
Code Quality - FAQs
(4)
30+ Java Code Review Checklist Items
5 Java unit testing interview Questions and Answers
8+ JMeter performance testing interview Q&As
Ensuring code quality in Java Q&As
Code Quality - Profiling
(3)
01: jvisualvm tutorial to sample Java heap memory
02: jvisualvm to detect memory leak - a quick tutorial style Java demo
jvisualvm to debug deadlocks in Java
Code Quality - Performance Test
(2)
8+ JMeter performance testing interview Q&As
JMeter for performance testing REST services with BeanShell
Code Quality - Unit Testing
(3)
Code Quality - BDD
(4)
Java BDD (Behavior Driven Development) interview Q&A
jBehave and BDD example
jBehave and jUnit for BDD
jBehave with tabular story data
Code Quality – Testing DAOs
(4)
Part #3: JPA Hibernate Spring Maven Eclipse Tutorial - testing data access with HSQLDB
Unit Test Hibernate - DAO Layer with JPA, Spring & HSQLDB
Unit Test Hibernate - DAO Layer with Spring & HSQLDB
Unit Testing Data Access Logic in Java
Code Quality – JUnit Spring
(6)
01: JUnit with Mockito step by step
02: Unit testing with JUnit, Mockito & Spring
03: Mockito to fully mock the DAO layer
04: Mockito partially mocking with @Spy
05: Mockito & PowerMock partially mocking private methods with @Spy
06: Mockito & PowerMock for mocking static methods
Code Quality – JUnit Web
(2)
Spring Controller Unit Testing
Unit Testing Servlet filter with Mockito
Code Quality - Spring TXN
(2)
Integration Unit testing Spring Transaction Management
Unit testing Spring Transaction Management
5 Java unit testing interview Questions and Answers
JUnit with Hamcrest
Spring Boot in unit testing - 6 things you must know
100+ Java coding Q&As
Coding - Can you write code?
(22)
05: Finding the 2nd highest number in an array in Java
08: Write code to add, subtract, multiply, and divide given numbers?
17 Java coding tips for job interviews and pre-interview coding tests
Fibonacci number
Fibonacci number with caching and Java 8 FP
Find 2 numbers from an array that add up to the target
Find the first non repeated character in a given string input
Finding the missing numbers Java example
Finding the perfect number
Fizz Buzz
Generating random numbers in Java
Huffman coding in Java
Iteration Vs Recursion
Java 8 String streams and finding the first non repeated character with functional programming
Java coding practice problems - prime and powerful
Java coding question on recursion and generics
Palindrome
Reverse a given String
Reverse Polish Notation (RPN)
Sorting a list of numbers by frequencies in Java using a BST tree
Sorting a list of numbers by frequencies in Java using a map
Splitting input text & string processing coding Q&A
Coding - Complete the code
(13)
01: String parsing & date formatting - complete the given code
02: Working with Java Collections - Complete the given code
03: Tree navigation - is a BST Tree?
04: Are Anagrams - Complete the given code
05: Is a palindrome - complete the given code
06: Change Dir Path - String parsing & working with collections
07: Index of long consecutive characters in a string - flow control
08: Jumping Frog problem in Java - Complete the given code
09: Find all permutations of a given string - best example to understand recursion
10: Find all permutations of a given string - Iteration in Java
11: Threads performing tasks by talking to each other
12: Complete the trades matching logic
13: Atomicity, Visibility, & synchronization in Java
Coding - Converting from A to B
(6)
04: Convert Lists to Maps and Maps to Lists with Java 8 power
Convert Arrays to Lists and lists to array with real life example(s)
Convert Java Date/Time to String & String back to Date/Time
Converting a BST Tree to a List in Java
Converting an Array/List to BST in Java
Converting String to Amount and Amount to String
Coding - Designing your classes
(9)
01: Can you design classes & interfaces using OO?
02: Scenarios based Java OO concepts & GoF design patterns - naive Template Method pattern
03: Scenarios based Java OO concepts & GoF design patterns - Strategy Pattern
Class invariant & designing by contract
How would you go about designing with UML diagrams
Part 1: Badly designed Java classes & interfaces
Part 2: Badly designed classes & interfaces
Part 3: Badly designed classes & interface
Part 4: Badly designed classes & interfaces
Coding - Data Structures
Coding - Arrays
(2)
Beginner array coding problems in Java
Find pair of numbers with a given sum in Java
Coding - Big O notation
(2)
03: Understanding Big O notations
Big O notation questions and answers with Java examples
Coding - Graph Structure
(2)
Graph from scratch Java example
Graph from scratch Java example adjacent matrix approach
Coding - LinkedList Structure
(2)
Find middle element of a LinkedList in one pass Java example
LinkedList creating from scratch in Java
Coding - Map Structure
(1)
HashMap from scratch Java example
Coding - Pointer Algorithms
(3)
Find 2 numbers from an array that add up to the target
Single Pointer: Partitioning around a pivotal number
Two Pointers: Partitioning around a pivotal number
Coding - Queue Structure
(1)
Queue from scratch Java example
Coding - Searching Algo
(1)
Linear & Binary Search in Java
Coding - Sorting Algo
(4)
Quick Sort in Java
Sorting by reversing the entries in Java
Swap 2 values & bubble sort in Java
Swapping, partitioning, and sorting algorithms in Java
Coding - Stack Structure
(1)
Stack from scratch Java example
Coding - Tree structure
(14)
00: Tree from a list & flattening it back to a list in Java
01: Tree flattening example in Java
02: Tree structure - calculate average recursively & iteratively in Java
03: Tree traversal algorithms in Java
04: Tree - Get root to leaf max sum in Java example
05: Is it a valid binary search tree (BST) ?
06: Binary Tree - Sum Levels Java Example
06: Binary Tree – Get root to leaf max sum in Java example
07: Tree - Sum Levels Java example
08: Part-1: Basic Java Tree structure interview questions and coding questions
09: Part 2: Java Tree structure interview questions and coding questions
10: Part-3: Java Tree structure interview and coding questions
11: Part 4: Java Tree structure interview and coding questions
Recursion Vs Tail Recursion
Coding - Data Which & Why
(2)
09: When to use which Java data structure? and why?
9 Java Data structures best practices
Coding - Passing the unit tests
(5)
02: Tree structure - calculate average recursively & iteratively in Java
Prerequisite: if want to work with Maven & eclipse
Processing data from a file & sorting them
Working with a given input string & character processing
Working with monetary values
Coding - What is wrong?
(10)
01: What is wrong with following Java code snippets? Auto-unboxing, switch, short circuit & exception
03: What is wrong with this code? Data types & equals( ) Vs, hashCode( ) contract
04: What is wrong with this code? Java Collection & ConcurrentModificationException
05: What is wrong with this code? Deep Vs Shallow comparison & multithreading
06: What is Wrong with this code? Multithreading & wait/notify
07: What is wrong with this code? Multithreading & locks
08: What is wrong with this code? Generics
09: What is wrong with this code? HashMap & Race condition
10: What is wrong with this code? ConcurrentHashMap & Atomic operations
What is wrong with this code? Heap Vs Stack, Thread safety & Synchronized
Coding - Home Assignments
(5)
1. Set up environment for home coding assignments
2. Implement an in-memory LRU cache in Java with TTL
3. Multi-Threading - Create a simple framework where work items can be submitted
4a. 10-digit phone number to produce a list of words matching first letters of the phone number
4b. FP approach 10-digit phone number to produce a list of words matching first letters of the phone number
Coding - Written Test Core Java
(4)
04: 7 Java Collection Quizzes
Q01-Q07 written test questions and answers on core Java
Q08-Q15 written test questions and answers on core Java
Q16-Q24 written test questions and answers on core Java
Coding - Written Test JEE
(1)
10 Java web services written test questions and answers

16+ Java Key Areas Interview Q&As

16+ Java Key Areas Q&As
Key Area - Going places
(2)
00: 16+ Tech Key Areas to go places as a Java Engineer or Architect
Why acquire skills & experience in low latency & Big Data? What specific skills are required?
Key Area - Ice Breaker
(7)
04: Can you think of a time where you ...?
15 slacknesses or lack of experience that can come back & bite you in the back
3 key "How would you go about ..." Q&As to judge Java experience
30+ Java Code Review Checklist Items
8 real life Java scenarios with Situation-Action-Result (i.e. SAR) technique
8 real life Scenarios of SAR technique - Part 2
Ensuring code quality in Java Q&As
Key Area - Design Concepts
(7)
01: Q13 "12 Rules" for REST API design & development
05: Q19-Q24 How to create a well designed Java application?
06: Q25 - Q32 Design principles interview questions & answers for Java developers
6 tips to go about writing loosely coupled Java applications
Understanding Open/Closed Principle (OCP) from the SOLID OO principles with a Java example
Why does good API design matter?
Why favour composition over inheritance?
Key Area - Judging Experience
(26)
01: 12+ Git Source control must know basics interview Q&As
02: 15 key considerations for low latency Java
02: 5 Java multithreading scenarios interview
05: Q19-Q24 How to create a well designed Java application?
1. Asynchronous processing in Java real life examples - part-1
10 ERD (Entity-Relationship Diagrams) Interview Q&As
11 "In your Java experience" interview questions & answers
12: 5 Java synchronize & concurrency mgmt scenarios interview Q&As
12+ FX or Forex Trading questions & answers
15 Banking & finance domain knowledge interview Q&As
15 slacknesses or lack of experience that can come back & bite you in the back
15+ SQL scenarios based interview Q&As - part 1
15+ SQL scenarios based interview Q&As - Part 2
15+ SQL scenarios based interview Q&As – Part 3
17 Java coding tips for job interviews and pre-interview coding tests
18 Java scenarios based interview Q&As for the experienced - Part 1
18 Java scenarios based interview Q&As for the experienced - Part 2
2. Asynchronous processing in Java real life examples - part-2
3 key "How would you go about ..." Q&As to judge Java experience
30+ SDLC activities you perform as a Java developer
6 Key considerations in processing large files in Java
7 Java debugging interview questions & answers
Dealing with concurrent modifications in Java
How to perform impact analysis across Java based applications?
SDLC process interview Q&As
SQLException handling - recoverable & irrecoverable scenarios
Key Area - Best Practices
(6)
10 Core Java Best Practices with an industry strength code sample
5 Java unit testing interview Questions and Answers
9 Java Data structures best practices
Can you list 10 JEE best practices from your experience?
How will you go about improving on the following Java code?
Top 5 Core Java Exceptions and best practices
Key Area - Concurrency Mgmt
(6)
02: 5 Java multithreading scenarios interview
12: 5 Java synchronize & concurrency mgmt scenarios interview Q&As
5 Java concurrency management interview Q&As
Dealing with concurrent modifications in Java
JConsole for debugging deadlocks in Java
jvisualvm to debug deadlocks in Java
Key Area - Low Latency
(10)
01: 13 Java low latency interview questions & answers
02: 15 key considerations for low latency Java
03: Java GC tuning for low latency applications
03: Understanding Big O notations
04: Java primitives & objects memory consumption
06: Capture throughput & latencies with "Metrics Core" tutorial
07: Reactive Programming or Reactor pattern (RP) in Java Interview Q&As
1. Asynchronous processing in Java real life examples - part-1
2. Asynchronous processing in Java real life examples - part-2
9 Java Garbage Collection interview questions & answers
Key Area - CI/CD & DevOps
(7)
10 DevSecOps interview Q&As
17+ DevOps CI/CD Jenkins interview Q&As
21 Docker DevOps interview Q&As
4 DevOps interview Q&As
9+ CI/CD Docker compose DevOps interview Q&As
DevOps Kubernetes (aka K8s), Docker & Microservices Q&As
Docker DevOps Q&As with Big Data code snippets
Key Area - Debugging
Key Area - Debug Hibernate
(3)
03: Identifying and fixing NonUniqueObjectException in Hibernate
04: Identifying and fixing LazyInitializationException in Hibernate
05: Debugging Hibernate & handling 4 common issues
Key Area - Debug Java
(11)
5 Ways to debug thread-safety issues in Java
7 Java debugging interview questions & answers
Debugging "NoSuchMethodError" in Java
Debugging JAR hell issues in Java
Debugging Java version issues
Debugging like a pro with eclipse IDE tutorial for Java developers
Debugging LinkageErrors in Java
javap for debugging and better understanding some Java concepts with 3 practical examples
JConsole for debugging deadlocks in Java
jvisualvm to debug deadlocks in Java
Remote debugging in Java with Java Debug Wire Protocol (JDWP)
Key Area - Debug JEE
(5)
02: HTTP basics on headers, MIME types, & cookies for Java developers
Chrome Postman to test and debug RESTful Web Services
Debugging connection refused issues in Java with 9 tips
Debugging java.security.cert.CertificateException: Certificates do not conform to algorithm constraints
Debugging SSL issues in Java & tools to debug
Key Area - Debug Spark
(4)
Debugging Spark applications written in Java locally by connecting to HDFS, Hive and HBase
Finding your way around YARN and Spark on Cloudera
Remotely debugging Spark submit Jobs in Java
Spark understanding DAG for tuning performance interview Q&As
Key Area - Debug Spring
(2)
06: Debugging NoSuchBeanDefinitionException in Spring
07: Debugging Spring Transaction Management
Key Area - Design Patterns
Key Area - GoF Design
(8)
12 Java design patterns interview Q&As
14: Singleton design pattern in Java & 5 key follow up Interview Q&As
Builder pattern and immutability in Java
Design pattern intents interview Q&A
Flyweight design pattern to improve memory usage & performance
Java ExecutorService with strategy design pattern to execute concurrently & sequentially
Proxy design pattern in Java with service retry example
Why do Proxy, Decorator, Adapter, Bridge, and Facade design patterns look similar? What are the differences?
Key Area - JEE Design
(3)
06: Web design patterns MVC2, MVP, MVVM & MVW
4 JEE Design Patterns Interview Q&As
EIP
Key Area - Exception Handling
(4)
Java exception handling interview questions and answers
Java String & Array limitations and OutOfMemoryError
SQLException handling - recoverable & irrecoverable scenarios
Top 5 Core Java Exceptions and best practices
Key Area - Memory Mgmt
(9)
01: jvisualvm tutorial to sample Java heap memory
02: jvisualvm to detect memory leak - a quick tutorial style Java demo
10: 8 Java Maps & Caching Data in Java Interview Q&As
6 Key considerations in processing large files in Java
8 Java memory management interview Q&As
9 Java Garbage Collection interview questions & answers
Java String & Array limitations and OutOfMemoryError
javap, jps, jmap, and jvisualvm tutorial - analyzing the heap histogram
Monitoring/Profiling Java applications interview Q&A
Key Area - Performance
(13)
02: 15 key considerations for low latency Java
10: 8 Java Maps & Caching Data in Java Interview Q&As
4 FAQ Performance tuning in Java interview Q&As
6 Key considerations in processing large files in Java
8+ JMeter performance testing interview Q&As
9 Java Garbage Collection interview questions & answers
javap, jps, jmap, and jvisualvm tutorial - analyzing the heap histogram
JMeter for performance testing REST services with BeanShell
Monitoring/Profiling Java applications interview Q&A
Processing large files efficiently - BigData & Hadoop - part 3
Processing large files efficiently in Java - multi-threaded code - part 2
Top 10 causes of performance issues in Java
Understanding service and socket timeouts in Java enterprise applications
Key Area - Scalability
(3)
02: 15 key considerations for low latency Java
6 Scaling your Java applications interview Q&As
Straight Through Processing, OLTP, Data warehousing & OLAP
Key Area - SDLC
(7)
04: Git Merging Vs rebasing interview questions and answers
05: Git & Maven for releasing software artifacts Q&A
18 Agile Development interview Q&A for Java developers
30+ SDLC activities you perform as a Java developer
Java BDD (Behavior Driven Development) interview Q&A
SDLC process interview Q&As
Source control system and subversion (aka SVN) Q&A
Key Area - Security
(18)
10 Encryption and Decryption interview Q&As
12 Kerberos interview Q&As
15 Security key area interview Q&A for Java developers
6 Authentication Protocols Interview Q&As - LDAP, Kerberos, OAuth2 & SAML
6 LDAP Interview Q&As
AWS Web Application Security Q&As
Connecting DBeaver to Databases with Kerberos security & SSL
Debugging java.security.cert.CertificateException: Certificates do not conform to algorithm constraints
Debugging SSL issues in Java & tools to debug
HTTP Basic Authentication Interview Q&A for Java developers & architects
Injection attack prevention Q&A
Preventing XSS attacks in Java
Security holes & how to fix them interview Q&A
Session Hijacking prevention Questions & Answers
Spring security tutorial
SSL and truststore vs keystore for Java developers
SSL in Java with Keytool to generate public-private key pair
Understanding service and socket timeouts in Java enterprise applications
Key Area - Productivity Tools
(23)
01: 14 Unix must-know interview Q&As
Chrome Postman to test and debug RESTful Web Services
Debugging JAR hell issues in Java
Debugging like a pro with eclipse IDE tutorial for Java developers
Debugging SSL issues in Java & tools to debug
Handy DOS commands for Java developers
How to perform impact analysis across Java based applications?
JMeter beginner tutorial
Notepad++ beginner tutorial
Notepad++ productivity tips with SQL trigger code example
Notepad++ to construct SQL where clause
Power of Excel spreadsheet to dynamically generate SQL
Power of SQL as a productivity tool
sed and awk to write shell scripts for Java developers
Source control system and subversion (aka SVN) Q&A
Splunk to analyse Java logs and other machine data
Top 10 Eclipse short-cut keys every Java developer using eclipse IDE must know
Top 7+ Java productivity tools that make your life easier as a Java developer
Unix history commands for Java developer productivity
Unix remoting interview Q&A for Java developers
Unix script to archive files for auditing
Unix Sed commands for Java developers
Unix tutorial with MobaXterm
Key Area - Transaction Mgmt
(6)
07: Debugging Spring Transaction Management
9 Java Transaction Management Interview Q&As
Event sourcing & CQRS interview Q&As
JTA interview Q&A
Spring, JavaConfig (@Configuration), and TransactionManager
Transaction management in SQL -- Sybase example
Key Area - QoS & SLAs
(8)
15 slacknesses or lack of experience that can come back & bite you in the back
Auditing database record changes in Oracle
Auditing, data retention and archiving interview Q&A
How do you monitor the JVM?
Monitoring/Profiling Java applications interview Q&A
QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability - Non Functional Requirements
Splunk to analyse Java logs and other machine data
Understanding service and socket timeouts in Java enterprise applications

800+ Java Interview Q&As

300+ Core Java Interview Q&As
Core Java - Overview
(4)
03: 9 Core Java Concepts you can't afford to not know
04: Top 10 most common Core Java beginner mistakes
17 Java getting started interview questions and answers
Java Compile-time Vs Run-time Interview Q&As
Core Java - Data types
(9)
01: Java data types interview Q&As
02: 10 Java String class interview Q&As
03: Java autoboxing & unboxing benefits & caveats interview Q&As
04: Java primitives & objects memory consumption
05: Java Date and Time Interview Q&As
06: Understanding TimeZones with Java 8 examples
Convert Java Date/Time to String & String back to Date/Time
Converting String to Amount and Amount to String
Generating a UUID (aka GUID) in Java
Core Java - Constructors
(1)
Java initializers, constructors, regular methods and static factory methods - when to use them with examples.
Core Java - Reserved Key Words
(2)
6 Java Modifiers every interviewer likes to Quiz you on
Java identifiers
Core Java - Classes
(3)
3 Java class loading interview Q&As
Java abstract classes Vs interfaces Interview Q&As
Java classes and interfaces are the building blocks
Core Java - Objects
(7)
06: HashMap & HashSet and how do they internally work? What is a hashing function?
5 Java Object class methods interview questions & answers
8 Java immutable objects interview questions & answers
Java enum interview questions & answers
Java serialization, cloning, and casting interview Q&A
Mocks, stubs, domain, and anemic objects interview Q&A
Object equals Vs == and pass by reference Vs value
Core Java - OOP
(10)
03: Q16 - Q17 Java Polymorphism vs Overriding vs Overloading
04: Q18 Explain abstraction, encapsulation, Inheritance, and polymorphism with the given Java code?
05: Q19-Q24 How to create a well designed Java application?
06: Q25 - Q32 Design principles interview questions & answers for Java developers
07: Q33 Top 5 OOP tips for Java developers
08: Write code to add, subtract, multiply, and divide given numbers?
Q1 - Q10 Java OOPs interview Q&As
Understanding Open/Closed Principle (OCP) from the SOLID OO principles with a Java example
What are good real life Java inheritance (or use of abstract classes) examples ?
Why favour composition over inheritance?
Core Java - GC
(2)
03: Java GC tuning for low latency applications
9 Java Garbage Collection interview questions & answers
Core Java - Generics
(5)
01: 7 rules to remember on Java Generics for better understanding
03: 12 Java Generics interview Q&As
04: 5 Java generics Interview Q&As on wildcards with examples
05: Overloaded methods Vs Generic methods in Java with JD-GUI & javap to look under the covers
Java Generics in no time "? extends" & "? super" explained with a diagram
Core Java - FP
(12)
01: 19 Java 8 Functional Programming FAQs
02: Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples
03: Functional interfaces and Lambda expressions Q&A
04b: 6 Java FP partial functions & currying interview Q&As
05: 7 Java FP (lambda expressions) real life examples in wrangling normal & big data
06: 5 Java FP interview Q&As on category theory & monoids
07: 4 Java FP Functors Interview Q&As
08: 4 Java FP Monads interview Q&As with examples
5 FAQs on transforming your thinking from OOP to FP
Fibonacci number with caching and Java 8 FP
Java 8 String streams and finding the first non repeated character with functional programming
Java 8: What is currying? Does Java 8 support currying?
Core Java - OOP to FP
(9)
01: OOP vs FP with Java example - placing a trade
02: OOP vs FP with Java example - Conversion strategy pattern
03: Java FP composing functions example - calculate discount
04: Java OOP vs FP - Builder Pattern
05: Java OOP vs FP - Handling unchecked exceptions
06: Java FP - handling checked exceptions
07: Java FP - CompletableFuture monadic chaining with examples - part 1
08: CompletableFuture monadic chaining with examples - part 2
09: Java FP - CompletableFuture Error Handling
Core Java - I/O
(8)
06: Java 8 way of File reading and functionally processing the data
15 Java old I/O and NIO (i.e. New I/O) interview Q&As
6 Key considerations in processing large files in Java
Processing large files efficiently - BigData & Hadoop - part 3
Processing large files efficiently in Java - multi-threaded code - part 2
Read a text file from Java classpath
Reading a text file in Java with the Scanner
Reloading configuration files in Java without stopping the server
Core Java - Multithreading
(15)
02: 5 Java multithreading scenarios interview
03: 7 Things you must know about Java locks and synchronized key word
04: 6 popular Java multithreading interview Q&As for the experienced
05: 9 Java multithreading Q&As on concepts like blocking, sequencing, preempting, time slicing & daemon threads
06: 10+ Atomicity, Visibility, and Ordering interview Q&A in Java multi-threading
07: Java FP - CompletableFuture monadic chaining with examples - part 1
07: Java ThreadLocal Interview questions & answers
08: 7 basic Java Executor framework Interview Q&As with Future & CompletableFuture
08: CompletableFuture monadic chaining with examples - part 2
09: Java FutureTask example
10: ExecutorService Vs Fork/Join & Future Vs CompletableFuture Interview Q&As
14: Java Thread stop, resume, suspend & interrupt interview Q&As
15+ Java beginner multithreading interview FAQs
Java ExecutorService with strategy design pattern to execute concurrently & sequentially
Producer and Consumer Java Multi-threading code
Core Java - Data Structures
(5)
03: Tree traversal algorithms in Java
Java coding practice problems - prime and powerful
Searching algorithms in Java
Splitting input text & string processing coding Q&A
Swapping, partitioning, and sorting algorithms in Java
Core Java - Annotations
(2)
8 Java Annotations interview Questions and Answers
More Java annotations interview questions & answers
Core Java - AOP
(1)
4 AOP interview Q&As with Spring, Aspectj & Java annotations examples
Core Java - Other
(4)
How to perform impact analysis across Java based applications?
How to write internationalized Java applications?
Understanding atomicity with a Java example
Working with .properties config files in Java
Core Java - Collection API
(13)
02: 9 Java Collection interview Q&As on choosing the right data structure
02: Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples
03: Understanding Big O notations
04: 7 Java Collection Quizzes
05: 4 Sorting objects in Java interview Q&As
06: HashMap & HashSet and how do they internally work? What is a hashing function?
07: Java Iterable Vs Iterator differences and know how
08: If Java did not have a stack or map, how would you ....
09: When to use which Java data structure? and why?
10: 8 Java Maps & Caching Data in Java Interview Q&As
17 FAQ Java Collection interview Q&As
Java 8: Different ways to sort a collection of objects in pre and post Java 8
Sorting a Map by values instead of keys
Core Java - Differences X & Y
(5)
07: Java Iterable Vs Iterator differences and know how
17 FAQ Java Collection interview Q&As
Core Java Modifiers, Generics, and Annotations: differences
Differences between Spring XML and Spring JavaConfig (@Configuration)
Multithreading interview Q&As on differences between X and Y
Core Java - Event Driven
(2)
Event Driven Programming in Java - Part 1
Event Driven Programming in Java - Part 2
Core Java - Exceptions
(1)
Top 5 Core Java Exceptions and best practices
Core Java - Java 7
(2)
Java 7 fork and join tutorial with a diagram and an example
Java 7: Top 8 new features with examples
Core Java - Java 8
(24)
01: 19 Java 8 Functional Programming FAQs
02: Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples
03: Functional interfaces and Lambda expressions Q&A
04: Convert Lists to Maps and Maps to Lists with Java 8 power
05: 7 Java FP (lambda expressions) real life examples in wrangling normal & big data
05: Finding the 2nd highest number in an array in Java
06: Java 8 way of File reading and functionally processing the data
06: Understanding TimeZones with Java 8 examples
07: Java 8 API examples using lambda expressions and functional programming
08: Write code to add, subtract, multiply, and divide given numbers?
10: ExecutorService Vs Fork/Join & Future Vs CompletableFuture Interview Q&As
5 FAQs on transforming your thinking from OOP to FP
Fibonacci number with caching and Java 8 FP
Java 8 String streams and finding the first non repeated character with functional programming
Java 8 using the Predicate functional interface
Java 8: 7 useful miscellaneous additions you must know
Java 8: Different ways to sort a collection of objects in pre and post Java 8
Java 8: Does "Optional" class alleviate the pain of ubiquitous NullpointerException?
Java 8: What is currying? Does Java 8 support currying?
Learning to write functional programming with Java 8 with examples
Non-trival Java 8 tutorial to appreciate the power of functional programming (FP)
Top 6 Java 8 features you can start using now
Top 8 Java 8 feature list
Understanding Java 8 Streams and working with collections using Lambda expressions
Core Java - JVM
(7)
01: jvisualvm tutorial to sample Java heap memory
02: jvisualvm to detect memory leak - a quick tutorial style Java demo
04: Java primitives & objects memory consumption
06: 10+ Atomicity, Visibility, and Ordering interview Q&A in Java multi-threading
3 Java class loading interview Q&As
5 JMX and MBean interview questions & answers
9 Java Garbage Collection interview questions & answers
Core Java - Reactive Program
(3)
07: Reactive Programming or Reactor pattern (RP) in Java Interview Q&As
10: ExecutorService Vs Fork/Join & Future Vs CompletableFuture Interview Q&As
3. Multi-Threading - Create a simple framework where work items can be submitted
Core Java - Swing & AWT
(2)
5 Swing & AWT interview questions and answers
Q6 - Q11 Swing interview questions and answers
Core Java - Understanding
(4)
03: 7 Things you must know about Java locks and synchronized key word
03: Java autoboxing & unboxing benefits & caveats interview Q&As
06: HashMap & HashSet and how do they internally work? What is a hashing function?
Understanding Overriding, Hiding, and Overloading in Java? How does overriding give polymorphism?
300+ Enterprise Java Interview Q&As
JEE - Overview
(2)
4 more Java EE overview interview questions and answers
8 JEE (i.e. Java EE) Overview interview Q&As
JEE - Web basics
(10)
01: 12 Web basics every Java web developer must know - Part 1
02: HTTP basics on headers, MIME types, & cookies for Java developers
03: 21+ Java Servlet interview Q&As
04: 7 JSP interview questions and answers
05: Web patterns interview Q&A
06: Web design patterns MVC2, MVP, MVVM & MVW
07: When to use a ServletContextListener in Java EE? Understanding ServletContext and ServletContextListener with examples
08: Web.xml interview questions and answers
12 Web basics every Java web developer must know – Part 2
Client-side & Server side view technologies Q&As
JEE - Web Services
(11)
01: 7 must know Java Web Services Interview Q&As
02: 6 Java RESTful Web services Interview Q&As
03: JAX-RS how to create a RESTFul Web Service in Java?
04: 5 JAXB interview Questions & Answers
05: REST Service URI conventions with Spring MVC
06: RESTful Web services and HATEOAS Q&A
07: HATEOAS RESTFul Service with Spring tutorial
08: REST constraints (i.e. design rules) interview Q&A
09: 11 SOAP Web service interview Q&As
10: SOAP Web Service Styles Interview Q&A
11: JAX-WS how to create a SOAP web service in Java?
JEE - JPA
(2)
10: Spring, JavaConfig (i.e @Configuration), JPA & Hibernate by example
8 JPA interview questions and answers
JEE - JTA
(1)
JTA interview Q&A
JEE - API Design
(2)
01: Q13 "12 Rules" for REST API design & development
Why does good API design matter?
JEE - JDBC
(5)
02: JDBC with MySQL, Datasource, and connection pool Tutorial
12 FAQ JDBC interview Q&As
JDBC NamedParameterStatement versus PreparedStatement
JDBC Overview Interview Questions and Answers
Spring, JavaConfig (i.e @Configuration) & JDBC by example
JEE - Microservices
(8)
01: Q07 - Q12 Java Micro & Web services Interview Q&As
03: Kubernetes (i.e. Minikube) - deploy a spring boot microservice app
10+ Domain Driven Design (i.e. DDD) Interview Q&As
10+ Key Microservices Interview Questions Answered
15 Spring Boot interview Q&As
Event sourcing & CQRS interview Q&As
QoS & SLAs interview Q&As on Availability, Serviceability, Fault tolerance & Disaster Recoverability - Non Functional Requirements
Spring Cloud Microservices interview Q&As
JEE - JMS
(5)
16 FAQ JMS interview Q&As
Configuring JMS with Java Config for sending & receiving messages
JMS versus AMQP, Enterprise Integration Patterns (EIP), and Spring Integration versus Apache Camel
Spring JMS with Websphere MQ - configuring and sending messages
Spring JMS with Websphere MQ Listener (Receiver or Subscriber)
JEE - JMX
(3)
5 JMX and MBean interview questions & answers
Event Driven Programming in Java - Part 2
Yammer metrics tutorial with JMX to gather metrics
JEE - JNDI and LDAP
(2)
6 LDAP Interview Q&As
9 JNDI and LDAP interview Q&A
JEE - JSF
(2)
4 JSF interview Q&As
More JSF interview Q&A
JEE - Other
(3)
How to perform impact analysis across Java based applications?
JMS versus AMQP, Enterprise Integration Patterns (EIP), and Spring Integration versus Apache Camel
Spring security tutorial
150+ Java frameworks interview Q&As
Framework - Hibernate Q&As
(13)
02: Understanding Hibernate proxy objects and avoiding potential pitfalls
03: Identifying and fixing NonUniqueObjectException in Hibernate
04: Identifying and fixing LazyInitializationException in Hibernate
05: Debugging Hibernate & handling 4 common issues
07: Hibernate mistakes - accessing objects outside of a transaction
08: Hibernate automatic dirty checking of persistent objects and handling detached objects
09: Hibernate entities with auditable, soft delete & optimistic locking fields
10: Spring, JavaConfig (i.e @Configuration), JPA & Hibernate by example
11: Hibernate dependency jars and plugins
12: Hibernate custom data type : Blob type example
8 Hibernate interview Q&As
Hibernate First & second level cache interview Q&As
Q08 - Q15 Hibernate interview Q&As
Framework - Spring Core
(6)
01: Q01 - Q07 Spring core interview Q&As
01: Spring DI & IoC interview Q&As
01b: Q08 - Q13 Spring interview Q&As
04 17 Spring bean life cycles & scopes FAQs
05: 9 Spring Bean scopes interview Q&A
07. ⏯ Spring DI with Maven beginner video tutorial
Framework - Spring MVC
(7)
01: Spring MVC beginner tutorial step by step
02: Spring MVC form submission tutorial step by step
03: Spring MVC with Java Configs instead of XML configs step by step
04: Spring MVC with Thymeleaf and JavaConfigs
05: Spring 4 MVC RESTful Web Service Beginner Tutorial step by step
06: Spring 4 MVC RESTful GET & POST methods Web Services Tutorial
11 Spring MVC Interview Q&As
Framework - Spring Cloud
(1)
Spring Cloud Microservices interview Q&As
Framework - Spring boot
(1)
15 Spring Boot interview Q&As
Framework - Spring IO
(1)
Spring IO tutorial in 6 steps
Framework - Spring Config
(5)
10: Spring, JavaConfig (i.e @Configuration), JPA & Hibernate by example
Spring loading property files & properties
Spring, JavaConfig (@Configuration), and TransactionManager
Spring, JavaConfig (i.e @Configuration) & JDBC by example
Spring, JavaConfig (i.e @Configuration) & JMS by example

300+ Java & Big Data Tutorials

Tutorials - Big Data
TUT - ⏯ Starting Big Data
(5)
01: Databricks getting started - Spark, Shell, SQL
01A: Spark on Zeppelin - Docker pull from Docker hub
09: Docker Tutorial: Getting started with Hadoop Big Data on Cloudera quickstart
⏯ 02: Hue and terminal window to work with HDFS
⏯ 03: Java program to work with HDFS
TUT - Starting Spark & Scala
(10)
01. Setting up Scala & practicing the concepts via REPL the Scala way for Java developers
02. Setting up Scala IDE & using Maven plugins for Java developers
03. Setting up Scala and Spark with Maven
04. Setting up & getting started with sbt
05: Setting up & getting started with Spark local mode with Sbt & Scala
06: Setting up Spark-shell on Mac & getting started
07: Getting started with Spark-submit
08. Setting up & getting started with Hadoop on Mac
09. Getting started with Spark & Hadoop - client mode on local & cluster mode on yarn
10. Setting up & getting started with Hive
TUT - Starting with Python
(2)
01: Getting started with Python on Mac OS
02: Getting started with conda on Mac OS
TUT - Kafka
(3)
01: Getting started with Apache Kafka on Mac tutorial
02: Apache Kafka multi-broker cluster tutorial
03: Apache Kafka Connector Tutorial
TUT - Pig
(3)
1. Apache Pig Getting started
2. Apache Pig: Regex (Regular expressions)
3. Apache Pig: XPath for XML
TUT - Apache Storm
(3)
01: Installing & getting started with Apache Storm on Cloudera quickstart
02: Simple Apache Storm application running inside Eclipse in a local cluster
02: Simple Apache Storm application running on a single node local cluster
TUT - Spark Scala on Zeppelin
(14)
01A: Spark on Zeppelin - Docker pull from Docker hub
01B: Spark on Zeppelin - custom Dockerfile
02: Spark on Zeppelin - read a file from local file system
03: Spark on Zeppelin - DataFrame Operations in Scala
04: Spark on Zeppelin - DataFrame joins in Scala
05: Spark on Zeppelin - semi-structured log file
06: Spark on Zeppelin - RDD operation zipWithIndex
07: Spark on Zeppelin - window functions in Scala
08: Spark on Zeppelin - convert DataFrames to RDD[Row] and RDD[Row] to DataFrame
09: Spark on Zeppelin - convert DataFrames to RDD and RDD to DataFrame
10: Spark on Zeppelin - union, udf and explode
11: Spark on Zeppelin - Dataframe groupBy, collect_list, explode & window
12: Spark on Zeppelin - Dataframe pivot
13: Spark on Zeppelin – Dataframe date & timestamp
TUT - Cloudera
(5)
02. Installing & getting started with Cloudera QuickStart on VMWare for windows in 17 steps
03. Upgrading Java version in Cloudera Quickstart
Before running a Spark job on a YARN cluster in Cloudera and about the Spark history server
Understanding Cloudera Hadoop users
⏯ 01: Cloudera Manager Tutorial
TUT - Cloudera on Docker
(23)
09: Docker Tutorial: Getting started with Hadoop Big Data on Cloudera quickstart
10: Docker Tutorial: Hadoop Big Data services & folders on Cloudera quickstart
11: Docker Tutorial: Hadoop Big Data CLIs on Cloudera quickstart
12: Docker Tutorial: Hadoop Big Data configuration files on Cloudera quickstart
13: Docker Tutorial: Apache Spark (spark-shell & pyspark) on Cloudera quickstart
14: Docker Tutorial: Hive (via beeline) on Cloudera quickstart
15: Docker Tutorial: Hive & parquet-tools - csv to parquet on Cloudera quickstart
16: Docker Tutorial: Apache Spark (spark-shell) & parquet-tools – csv to parquet on Cloudera quickstart
17: Docker Tutorial: sqoop import - on Cloudera quickstart
18: Docker Tutorial: sqoop export - on Cloudera quickstart
19: Docker Tutorial: Apache Spark SQL - on Cloudera quickstart
20: Docker Tutorial: Apache Spark (spark-submit) in Java on Cloudera quickstart
21: Docker Tutorial: Apache Spark (spark-submit) in Scala on Cloudera quickstart
22: Docker Tutorial: Apache Spark (spark-submit) in Python 2.6 on Cloudera quickstart
23: Docker Tutorial: Apache Spark (spark-submit) in Python 3 with virtual env on Cloudera quickstart
24: Docker Tutorial: HBase (i.e. NoSQL DB) Shell on Cloudera quickstart
25: Docker Tutorial: HBase (i.e. NoSQL) Java API on Cloudera quickstart
26: Docker Tutorial: Apache Kafka install, create topic & publish message on Cloudera quickstart
27: Docker Tutorial: Apache Kafka with Java API on Cloudera quickstart
28: Docker Tutorial: Apache Spark streaming with Kafka in Java on Cloudera quickstart
29: Docker Tutorial: Apache Kafka with Python 3 on Cloudera quickstart
30: Docker Tutorial: Apache Spark streaming in Python 3 with Apache Kafka on Cloudera quickstart
31: Docker Tutorial: Apache Spark streaming in Scala with Apache Kafka on Cloudera quickstart
TUT - File Formats
(8)
01a: Convert XML file To Sequence File - writing & reading - Local File System
01b: Convert XML file To Sequence File – writing & reading – Hadoop File System (i.e HDFS)
02: Convert XML file To Sequence File with Apache Spark - writing & reading
03: Convert XML file To an Avro File - writing & reading
04: Convert XML file To an Avro File with Apache Spark – writing & reading
05: Convert XML file To an Avro File with avro-maven-plugin & Apache Spark
06: Avro Schema evolution tutorial
07: Avro IDL (e.g. avdl) to Java objects & Avro Schemas (i.e. avsc) tutorial
TUT - Spark on Docker
(8)
01: Docker tutorial with Java & Maven
02: Apache Spark - local mode on Docker tutorial with Java & Maven
03: Apache Spark cluster - Docker compose tutorial with Java, Maven & spark-shell
04: Apache Spark cluster – Docker compose tutorial with Java, Maven & spark-submit
05: Apache Spark local mode on Docker to read from AWS S3 bucket
06: Apache Spark standalone cluster on Docker to read from AWS S3 bucket
07: Apache Spark standalone cluster on Docker to read from & write to AWS S3 bucket
08: Apache Spark standalone cluster on Docker to read from AWS S3 bucket & write to MySQL database
TUT - Flume
(2)
01: Apache Flume with JMS source (Websphere MQ) and HDFS sink
02: Apache Flume with Custom classes for JMS Source & HDFS Sink
TUT - Hadoop (HDFS)
(5)
01: Apache Hadoop HDFS Tutorial
02: Java to write from/to Local to HDFS File System
03: Create or append a file to HDFS - Hadoop API tutorial
04: Create new or append to an existing AVRO file tutorial
05: Create or append a Sequence file to HDFS – Hadoop API tutorial
TUT - HBase (NoSQL)
(5)
1. HBase Tutorial Getting Started
2. HBase Shell commands
3. Understanding HBase (NoSQL) database basics in 7 steps
4. Setting up HBase with zookeeper to be used in Java via maven project
5. HBase atomic operations by examples
TUT - Hive (SQL)
(1)
13: Q98 - Q104 Apache Hive Basics Interview questions & answers
TUT - Hadoop & Spark
(16)
01: Learn Hadoop API by examples in Java
02: Learn Spark & AVRO Write & Read in Java by example
02a: Learn Spark writing to Avro using Avro IDL
03: Learn Spark & Parquet Write & Read in Java by example
04: Learn how to connect to HBase from Spark using Java API
05: Learn Hive to write to and read from AVRO & Parquet files by examples
06: Learn how to access Hive from Spark via SparkSQL & Dataframes by example
07: Learn Spark Dataframes to do ETL in Java with examples
08: Learn Spark how to convert RDD in Java to Dataframe with examples
09: Running a Spark job on YARN cluster in Cloudera
10: Solving AlreadyBeingCreatedException & LeaseExpiredException thrown from your Spark jobs
11. What are part- files in Hadoop & 6 ways to merge them
12: XML Processing in Spark with XmlInputFormat
13: Spark inner & outer joins in Java with JavaPairRDDs
14: Spark joins with SQLContext & JavaPairRDD
15: Spark joins with Dataframes & SQLContext
TUT - MapReduce
(3)
1. Hadoop MapReduce Basic Tutorial
2. Hadoop MapReduce Basic Tutorial
MapReduce to HBase: Read from & write to
TUT - Spark and Scala
(2)
01: Spark RDD joins in Scala tutorial
02: Spark RDD grouping with groupBy & cogroup in Scala tutorial
TUT - Spark & Java
(14)
01: Spark tutorial- writing a file from a local file system to HDFS
01B: Spark tutorial – writing to HDFS from Spark using Hadoop API
02: Spark tutorial – reading a file from HDFS
03: Spark tutorial – reading a Sequence File from HDFS
04: Running a Simple Spark Job in local & cluster modes
05: Spark SQL & CSV with DataFrame Tutorial
05a: Spark DataFrame simple tutorial
06: Spark Streaming with Flume Avro Sink Tutorial
07: spark-xml to split & read very large XML files
08: Spark writing RDDs to multiple text files & HAR to solve small files issue
09: Append to AVRO from Spark with distributed Zookeeper locking using Apache's Curator framework
10: Spark RDDs to HBase & HBase to Spark RDDs
11: Spark streaming with "textFileStream" simple tutorial
12: Spark streaming with “fileStream” and "PortableDataStream" simple tutorial
TUT - PySpark on Databricks
(28)
01: Databricks getting started - Spark, Shell, SQL
02: Databricks - Spark schemas, casting & PySpark API
03: Databricks - Spark SCD Type 1
04: Databricks - Spark SCD Type 2
04a: Databricks – Spark SCD Type 1 with Merge
04b: Databricks – Spark SCD Type 2 with Merge
05: Databricks - Spark UDFs
06: Databricks – Spark Window functions
07: Databricks – groupBy, collect_list & explode
08: Databricks – Spark problem 1
09: Databricks - Spark Problem 2
10: Databricks - Spark ML - Linear Regression
11: Databricks – Spark ML – Multivariate Linear Regression
11A: Databricks – Spark ML – Pandas Dataframe & Matplotlib
12: Databricks – Spark ML – Categorical Features
13: Databricks – Spark ML – Dummy Variables
14: Databricks – Spark ML – StringIndexer & OneHotEncoder
15: Databricks – Spark ML – Classification with Logistic Regression
16: Databricks – Spark ML Multiclass Logistic Regression & Pipeline
17: Databricks – Spark ML K-Folds Cross Validation
18: Databricks – Spark ML Decision Tree Classifier
19: Databricks – Spark ML Random Forrest Classifier
20: Databricks – Spark ML K-Means
21: Databricks – Spark ML Naive Bayes
22: Writing Tests in Databricks Notebooks in Python
23: PySpark Delta Lake on Databricks notebook
24: PySpark with Hierarchical Data on Databricks
25: PySpark SQL With Common Table Expression (i.e. CTE)
TUT - Zookeeper
(1)
01: Getting started with Zookeeper tutorial
Tutorials - Enterprise Java
TUT - ⏯ Starting with Java
(22)
01. Setting up Java step by step tutorial
01. ⏯ Setting up Java step by step video tutorial
02. Getting started with Java packages, projects, classpath & jar files
02a. ⏯ Getting started with Java packages, projects, classpath & jar files video tutorial
02b. ⏯ Java project with third-party libraries & unit testing without an IDE
03. Setting up Maven step by step tutorial
03. ⏯ Setting up Maven step by step video tutorial
04. Setting up Eclipse IDE step by step tutorial
04. ⏯ Getting started with Eclipse step by step beginner video tutorial
05. ⏯ Getting started with Eclipse & Maven beginner video tutorial
05.Getting started with Eclipse IDE & Maven step by step tutorial
05E. Explain Java and Maven set up via Q&As
06. Getting started with GitHub, EGit & Eclipse for Maven based Java projects
06a. ⏯ Getting started with GitHub, EGit & Eclipse video tutorial
06b. ⏯ GitHub pull request with EGit video tutorial
07. ⏯ Spring DI with Maven beginner video tutorial
08. Getting started with Apache Tomcat application server by deploying a simple JEE Application
08a. ⏯ Java Web App with Tomcat & Maven beginner video tutorial
08b. ⏯ Running Tomcat inside Eclipse beginner video tutorial
09. SonarQube with Maven Tutorial - Code Quality for Java developers
09a: ⏯ JUnit with Mockito step by step video tutorial
10: Getting started with MySQL database beginner tutorial
TUT - Diagnosis
(2)
Eclipse IDE tutorial diagnosis and tips for the beginners
Maven tutorial diagnosis and tips
TUT - Akka
TUT - Akka Scala
(3)
01: Simple Akka Tutorial in Scala step by step for the Java developers
02: Simple Akka tutorial in Scala with 2 Actors
03: Akka tutorial “ask” request – response pattern Scala way
TUT - Akka Java
(6)
01: Simple Akka tutorial in Java step by step
02: Simple Akka tutorial in Java with 2 Actors
03: Akka tutorial "ask" request - response pattern in Java
04: Akka tutorial "tell-tell" request - response pattern in Java
05: Akka tutorial in Java - calculating the factorials concurrently
06: Simple Akka remoting tutorial in Java - producer & consumer
TUT - AWS EC2
(4)
01: Getting started with AWS - creating accounts & setting up security
02: Creating AWS EC2 instances tutorial step by step
03: SSH to AWS EC2 instances via PuTTY & between other EC2 instances
04: Install AWS CLI to intercat with AWS services like S3
TUT - CI/CD Jenkins
(3)
01: Getting started with Jenkins on Docker tutorial
02: Getting started with Jenkins Multibranch pipeline on Docker tutorial
03: Getting started with Jenkins build triggers on Docker tutorial
TUT - Core Java
TUT - Debugging
(4)
Debugging like a pro with eclipse IDE tutorial for Java developers
javap for debugging and better understanding some Java concepts with 3 practical examples
Remote debugging in Java with Java Debug Wire Protocol (JDWP)
Top 10 Eclipse short-cut keys every Java developer using eclipse IDE must know
TUT - Java 8
(4)
02: Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples
Learning to write functional programming with Java 8 with examples
Top 6 Java 8 features you can start using now
Understanding Java 8 Streams and working with collections using Lambda expressions
TUT - JSON and Java
(1)
Java and JSON tutorial with Jackson library
TUT - Java Beginner
(1)
Java project with packages & jar file dependency without an IDE & build tool tutorial
TUT - XML and Java
(8)
Java and JAXB Tutorial - Marshaling
Java and JAXB tutorial - unmarshalling
Java and XML tutorial with DOM Parser
Java and XML tutorial with SAX parser - reading only
Java and XML tutorial with StAX parser - reading
Java and XML tutorial with Stax Parser - writing cursor based and iterator based
XML Parsing with JAXB implementation called MOXy
XML processing in Java overview with a Stax reader example
TUT - CSV and Java
(2)
BeanIO Java tutorial
Java OpenCSV tutorial to work with CSV files
TUT - Docker
(8)
01: Docker Tutorial - compile & run Helloworld.java
02: Docker Tutorial - Inspect the container
03: Docker Tutorial - Java & Maven with a jar file
04: Docker Tutorial - mount a host directory in a Docker container
05: Docker Tutorial - Client & Server on separate containers & networking
06: Docker Tutorial - Spring boot application
07: Docker Tutorial - Spring boot with Docker maven plugin
08: Docker Tutorial - client & server with docker-compose.yml
TUT - JEE
TUT - Web & Web Services
(7)
TUT - REST Client
(1)
Apache HTTPClient Tutorial to invoke RESTFul service
Apache HTTPClient POST request sample code
Creating a simple Java Web project with Maven - part 1
Creating a simple Java Web project with Maven - part 2 (Understanding war and pom.xml )
Creating a simple Java Web project with Maven - part 3 (with eclipse & m2e plugin)
RESTful Web Service Tutorial with Apache CXF, Maven, and Eclipse
RESTful Web Service Tutorial with RESTEasy, Spring, Maven, and Eclipse
SOAP Web Service Tutorial with Apache CXF, Maven, and Eclipse
TUT - JSF
(1)
JSF tutorial: JSF2.0, eclipse, and maven
TUT - JDBC
(6)
01: JDBC with MySQL Beginner Tutorial Step by Step
01a: ⏯ JDBC with MySQL Beginner Video Tutorial
02: JDBC with MySQL, Datasource, and connection pool Tutorial
02a: ⏯ JDBC with MySQL, Datasource, Connection Pool, and Prepared Statements Video Tutorial
03: JDBC with MySQL and PreparedStatements Tutorial
JDBC Tutorial with HSQLDB
TUT - FIX and Java
(3)
Finding your way around the FIX specification Q&A
FIX and Java tutorial with QuickFIXj
QuickFix Java example sending and recieving FIX messages
TUT - JAXB
(8)
01: JAXB Tutorial for XML processing in Java step by step - unmarshall & marshall
02: JAXB with StAX Tutorial step by step for unmarshalling
03: JAXB with StAX Tutorial step by step for marshalling
04: JAXB tutorial with XSD & binding.xjb
Java to marshal & unmarshal middle of an XML (i.e. a node inside XML) with JAXB
JAXB with Spring ORM for marshaling tutorial
JAXB with Spring ORM for unmarshaling tutorial
XML Parsing with JAXB implementation called MOXy
TUT - JMX
(1)
Exposing a Java class as a MXBean (or MBean) tutorial with jconsole
TUT - JPA
(2)
JPA with Hibernate & MySQL database tutorial step by step
Spring 3.0 tutorial - part 7 (with JPA, Hibernate & HSQLDB)
TUT - MySQL
(1)
10: Getting started with MySQL database beginner tutorial
TUT - Scala
TUT - Scala Actors
(1)
01: Scala Actors tutorial step by step
TUT - Spring & Hibernate
TUT - Hibernate
(3)
Hibernate Query Language (HQL) tutorial
Hibernate tutorial with HSQLDB
JPA with Hibernate & MySQL database tutorial step by step
TUT - Spring Basics
(10)
CDI annotations @Named and @Inject Dependency Injection in Spring 3.0 Tutorial
Spring 3.0 tutorial - Part 1 (Setter DI )
Spring 3.0 tutorial - Part 2 (Constructor DI )
Spring 3.0 tutorial - part 3 (Setter DI with annotations)
Spring 3.0 tutorial - part 4 (Setter DI with annotations and Java Config instead of XML)
Spring 3.0 tutorial - part 5 (Setter DI with Spring AOP and AspectJ)
Spring 3.0 tutorial - part 6 (with Hibernate & HSQLDB)
Spring 3.0 tutorial - part 7 (with JPA, Hibernate & HSQLDB)
Spring lookup-method example to inject prototype scoped bean into a singleton scoped bean
Top 6 Spring wiring via JavaConfig [i.e. @Configuration ] examples
TUT - Spring batch
(3)
Spring batch industrial strength tutorial - part2
Basic Spring batch tutorial with Maven and Eclipse.
Spring batch industrial strength tutorial - part1
TUT - Hibernate & Spring
(5)
Part #1: JPA Hibernate Spring Maven Eclipse Tutorial - setting up pom.xml
Part #2: JPA Hibernate Spring Maven Eclipse Tutorial - JPA configs and repository
Part #3: JPA Hibernate Spring Maven Eclipse Tutorial - testing data access with HSQLDB
Spring MVC RESTful with JPA, Hibernate & MySQL database beginner in 13 steps
Spring MVC Web Application with JPA, Hibernate & MySQL
TUT - Spring Boot
(6)
01: Simple Spring Boot Tutorial in 8 steps
02: Simple Spring Boot Restful Web Service Tutorial
03: Spring Boot Web & Actuator Beginner Tutorial Step by Step
04: Spring boot MVC tutorial with thymeleaf & bean validation
08: Spring boot with OpenAPI (Swagger) tutorial
Spring boot with Spring MVC, JPA, Hibernate & MySQL tutorial in 10 steps
TUT - Spring IO
(1)
Spring IO tutorial in 6 steps
TUT - Spring ORM
(2)
Spring 3.0 tutorial - part 6 (with Hibernate & HSQLDB)
Spring 3.0 tutorial - part 7 (with JPA, Hibernate & HSQLDB)
TUT - Spring other
(2)
Spring loading properties files with ApplicationContextInitializer
Spring tutorial to read .proprties files
TUT - Spring OXM
(2)
JAXB with Spring ORM for marshaling tutorial
JAXB with Spring ORM for unmarshaling tutorial
TUT - Spring Cloud
(9)
00: Create a simple REST API with Spring Boot
01 : Spring Cloud with Eureka Discovery Server Tutorial
02: Spring Cloud to register client with Eureka Discovery Server Tutorial
03: Spring Cloud Config Server with Git Tutorial
04: Spring Cloud Config Client with Git Tutorial
05. Spring Cloud routing with Netflix's Zuul
06: Spring Cloud declarative REST client Feign
07: Spring Cloud with Resilience4j CircuitBreaker
08: Spring boot with OpenAPI (Swagger) tutorial
TUT - Tools
TUT - JMeter
(3)
8+ JMeter performance testing interview Q&As
JMeter beginner tutorial
JMeter for performance testing REST services with BeanShell
TUT - Maven
(4)
TUT - Maven Assembly
(2)
Maven assembly & Shade plugins examples & uber jar creation
Maven assembly plugin examples
TUT - Maven Profiles
(1)
Creating a Maven profile to compile using a different JDK version tutorial
20+ Maven plugins listed for an enterprise Java (i.e. a JEE) project
Part 1: Creating an empty multi module maven project structure
Part 2- Adding dependency jars to multi-module MVN project
Part 3- Adding plugins to multi-module MVN project to perform specific tasks
TUT - Productivity Tools
(9)
Checkstyle & Maven Tutorial
Findbugs and Maven tutorial
Maven and Cobertura Tutorial
Notepad++ beginner tutorial
Notepad++ productivity tips with SQL trigger code example
Notepad++ to construct SQL where clause
Notepad++ with the power of regex for productivity tutorial
Power of Excel spreadsheet to dynamically generate SQL
Power of SQL as a productivity tool
TUT - Kubernetes
(3)
01: Install Kubernetes (i.e. minikube) on Mac
02: Kubernetes (i.e. Minikube) - deploy a node js service
03: Kubernetes (i.e. Minikube) - deploy a spring boot microservice app
TUT - ⏯ Videos
TUT - ⏯ Starting with Java
(12)
01. ⏯ Setting up Java step by step video tutorial
02a. ⏯ Getting started with Java packages, projects, classpath & jar files video tutorial
02b. ⏯ Java project with third-party libraries & unit testing without an IDE
03. ⏯ Setting up Maven step by step video tutorial
04. ⏯ Getting started with Eclipse step by step beginner video tutorial
05. ⏯ Getting started with Eclipse & Maven beginner video tutorial
06a. ⏯ Getting started with GitHub, EGit & Eclipse video tutorial
06b. ⏯ GitHub pull request with EGit video tutorial
07. ⏯ Spring DI with Maven beginner video tutorial
08a. ⏯ Java Web App with Tomcat & Maven beginner video tutorial
08b. ⏯ Running Tomcat inside Eclipse beginner video tutorial
09a: ⏯ JUnit with Mockito step by step video tutorial
TUT - ⏯ Spring Core
(1)
07. ⏯ Spring DI with Maven beginner video tutorial
TUT - ⏯ Spring MVC
(6)
01a: ⏯ Spring MVC beginner video tutorial step by step
02a: ⏯ Spring MVC form submission video tutorial step by step
03a: ⏯ Spring MVC with Java Configs instead of XML configs video tutorial
04a: ⏯ Spring MVC with Thymeleaf beginner video tutorial
05a: ⏯ Spring 4 MVC RESTful Web Service Video Tutorial
06a: ⏯ Spring 4 MVC RESTful POST method Video Tutorial
TUT - ⏯ JDBC, Hibernate
(6)
00: ⏯ MySQL database beginner video tutorial
01a: ⏯ JDBC with MySQL Beginner Video Tutorial
02a: ⏯ JDBC with MySQL, Datasource, Connection Pool, and Prepared Statements Video Tutorial
03a: ⏯ JPA with Hibernate & MySQL beginner video tutorial
04a: ⏯ Spring MVC RESTful with JPA, Hibernate & MySQL beginner video tutorial
05a: ⏯ Spring MVC web app with JPA, Hibernate & MySQL video tutorial
TUT - ⏯ Spring Boot
(2)
03a: ⏯ Spring Boot Web & Actuator Beginner Video Tutorial
⏯ Spring boot with Spring MVC, JPA, Hibernate and MySQL video tutorial
TUT - ⏯ Angular with Spring
(1)
⏯ AngularJS 1.x with Spring MVC beginner video tutorial
TUT - ⏯ Q&As
(2)
02: ⏯ Spring DIP, DI, & IoC interview questions and answers Video
⏯ Java high-level architecture & Integration Styles Interview Q&As Video
TUT - Other
TUT - SQL
(3)
00: ⏯ MySQL database beginner video tutorial
10: Getting started with MySQL database beginner tutorial
SQL Tutorial with HSQLDB
TUT - Drools
(5)
01: Drools tutorial with Maven and Eclipse
02: Drools tutorial -- A non trivial example with step by step instructions
03: Drools with Decision tables (Excel spreadsheet) tutorial
04: Drools with rules in an excel spreadsheet - Data validation
05: Drools with rules in an excel spreadsheet - Global variables & variable capture
TUT - Apache POI
(3)
Apache POI reading a xlsx file tutorial
Apache POI writing to a xlsx file tutorial
Apache POI writing to xlsx with styles
TUT - DOS
(2)
DOS script to execute a spring batch job
Handy DOS commands for Java developers
TUT - Dozer
(2)
Dozer bean mapping tutorial
Dozer with Spring & Maven Tutorial
TUT - ESB
(1)
Basic Apache Camel and Spring tutorial
TUT - Groovy
(3)
Groovy console for beginner and meta programming
groovysh beginner for eval exp, dynamic typing, operator overloading & closure
Setting up Groovy beginner tutorial with eclipse & command-line
TUT - Jasper Reports
(4)
01: JasperReports with iReport tutorial
02: JasperReports generating an Excel file
03: JasperReports pass parameters
04: JasperReport generating a PDF file
TUT - Logging and auditing
(6)
Auditing database tables Oracle tutorial
Java logging beginner tutorial with slf4j and Apache commons logging
Logging and auditing in Java with Spring AOP
Logging in Java with Logback and MDC Tutorial
Splunk to analyse Java logs and other machine data
Unix script to archive files for auditing
TUT - Metrics
(2)
06: Capture throughput & latencies with "Metrics Core" tutorial
Yammer metrics tutorial with JMX to gather metrics
TUT - Orika Mapping
(2)
Orika Bean Mapping Tutorial
Orika Bean Mapping with Spring
TUT - Pentaho Kettle ETL
(4)
Converting POJOs to Pentaho meta objects and then passing to a Kettle transformation
Invoking a Pentaho DI (i.e. Kettle) transformation from Java
Passing Pentaho DI (i.e. Kettle) rows of data to Java layer (i.e. POJOs)
Pentaho with user defined Java transformer tutorial
TUT - Unix
(7)
01: 14 Unix must-know interview Q&As
03: Shell script interview Q&As for Java developers
SSH Login without password so that tasks can be automated via shell scripts
Unix remoting interview Q&A for Java developers
Unix Sed commands for Java developers
Unix shell script to upload & download data between HDFS and edge node
Unix tutorial with MobaXterm
TUT - Webspeher MQ
(3)
01: Websphere MQ Client API Tutorial - Message Sender
02: Websphere MQ Client API Tutorial - Message Receiver
03: JMS API & File based JNDI Tutorial with Websphere MQ Client - Message Sender
TUT - YAML
(1)
YAML with Java using the SnakeYaml library tutorial
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