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01: ♦ Q07 – Q12 Java Micro & Web services Interview Q&As

Extends Java Web Services Basics Interview Q&As – Q17 – Q06. Q7. What is a microservice architecture (aka MSA)? A7. Martin Fowler defines Microservices as a subset of Service Oriented Architecture (SOA). In SOA, the services can be of any size. In a microservice, the service performs a single function.…...

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Posted in FAQs Java Web Services, Java Design & Architectural Patterns FAQs, member-paid, WebService

01: ♥ Q1 – Q6 Hadoop based data hub architecture & basics interview Q&As

70+ FAQ Hadoop interview questions answered with lots of diagrams and tutorials to work in the sought-after bigdata space. 70+ Scala interview questions and answers are also covered as Scala is popular in bigdata. Q1. What is Hadoop? A1. Hadoop is an open-source software framework for storing large amounts of

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Posted in Hadoop, Spark & BigData Interview Q&As, Java Design & Architectural Patterns FAQs

05: ETL architecture interview Q&As

Q1. What is an ETL process? A1. ETL is a architectural style, and it stands for Extract, Transform and Load. Extract does the process of reading data from an input data source like file, database, etc. Transform does the converting of data into a format that could be appropriate for…...

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Posted in Java Design & Architectural Patterns FAQs, member-paid

02: ♥♦ 13 Tips to write low latency applications in Java

Extends Writing low latency applications in Java interview Q&As. If the job description says “low latency” application, then be prepared. Even if “low latency” experience is not a requirement, all employers like candidates who can not only build systems that perform well, but also can stress test (e.g. JMeter), profile

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Posted in FAQs Free, FAQs Java Key Areas, Judging Experience Interview Q&A, Low Latency, Low latency & Asynchronous processing, Performance, Scalability
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2. Asynchronous processing in Java real life examples – part-2

Extends: 1. Asynchronous processing in Java real life examples – part-1. Example 3: Trade execution reports are received & processed asynchronously If you are working in an online trading application, you may want the functionality to queue trades and process them when the stock market opens. You also asynchronously receive…...

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Posted in Low latency & Asynchronous processing, member-paid

1. Asynchronous processing in Java real life examples – part-1

The scenario based questions are very popular with the job interviewers, and some scenario based questions are related to decoupling and asynchronous (aka non-blocking) processing in Java with message queues/topics, database tables where one process inserts data and another process consumes the inserted data, and Future objects in Java multi-threading.…...

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Posted in Judging Experience Interview Q&A, Low latency & Asynchronous processing, member-paid

♦ 10 ERD (Entity-Relationship Diagrams) Interview Questions and Answers

Q1. What is an ERD? A1. ERD or Entity-Relationship Diagram, is a chart that visually represents the relationship between database entities. ERDs model an organization’s data storage requirements with three main components: entities, attributes, and relationships. As UML is for charting the relationships and interactions among Java entities like classes…...

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04: ♦ How to go about designing a medium size JEE application?

A very popular open-ended question to judge your Java/JEE experience. Q. How would you go about designing a medium sized JEE application? A. Don’t start with 3-tier architecture, logical layers, Spring/Hibernate framework etc. The phases of designing any systems are: Requirements Gathering => Baseline Architecture => Design Alternatives & impact…...

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Posted in FAQs Java Architect, Java Design & Architectural Patterns FAQs, member-paid
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