Good handle on Java OOP concepts and FP concepts are very important NOT only from writing quality code perspective, but also from job interviews perspective to be able to do well …
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02: Java 8 Streams, lambdas, intermediate vs terminal ops, and lazy loading with simple examples
A stream is an infinite sequence of consumable elements (i.e a data structure) for the consumption of an operation or iteration. Any Collection<T> can be exposed as a stream. It looks …
03: Functional interfaces and Lambda expressions Q&A
The functional interfaces and Lambda expressions are going to make your code concise when coding with Java 8. These are the most awaited features among Java developers. If you understand the …
04: Convert Lists to Maps and Maps to Lists with Java 8 power
Why convert from a list to a map? Maps allow you to store and access data by a “KEY”. Lists only allow you to access data by either index or by …
05: 7 Java FP (lambda expressions) real life examples in wrangling normal & big data
This post extends Transforming your thinking from OOP to FP. In Big-data, functional programming is prevalent when working with data sets. For example, writing a Spark job to work with …
05: Finding the 2nd highest number in an array
Requirements gathering Does the array allow duplicates? 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 …
06: Understanding TimeZones with Java 8 examples
What is UTC? which stands for Coordinated Universal Time. The diagram below shows the standard time offsets of different countries. Some places observe daylight saving time (DST) during …
07: Java 8 API examples using lambda expressions and functional programming
Java 8 API examples using lambda expressions and functional programming. Example 1: The java.lang.Runnable interface has been made a functional interface.
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.
Approach …
10: ExecutorService Vs Fork/Join & Future Vs CompletableFuture Interview Q&As
Q1. What is the difference between “ExecutorService” and “Fork/Join Framework“?
A1. The Fork/Join framework uses a special kind of thread pool known as the ForkJoinPool, which …
5 FAQs on transforming your thinking from OOP to FP
Functional programming is prevalent in data engineering (i.e. Spark programming, etc) roles. A must know for Big Data Engineers and Analysts.
One needs to get used to the transformation from imperative …
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
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Learn by categories such as FAQs – Core Java, Key Area – Low Latency, Core Java – Java 8, JEE – Microservices, Big Data – NoSQL, etc. Some posts belong to multiple categories.
Overwhelmed by the number of Q&As?
No one knows everything, and a job interview is NOT a technical contest to see who gets the most number of questions right. Quality of the answers to FAQs, readiness & experience to tackle open-ended Q&As, ATTITUDE, communication skills, etc play a major part. 12 things to know about job interviews.
This is not only a job interview companion, but also a career companion for a quick reference & learn by category to proactively FAST-TRACK your career.
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