This not only one of the most popular Java OOP Interview Questions & Answers asked 90% of the time in job interview, but also a key OOP concept you must know well. The correct answer depends on the problem you are trying to solve, and the answer you give reveal a lot about your know-hows &
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Even the experienced Java developers dread Java multithreading interview questions & coding exercises. Interviewers love to drill you on multithreading as it can reveal a lot about your capabilities.
Q1. What is a thread?
A1. It is a thread of execution in a program.
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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 in written tests & technical interviews.
Q1. Can you explain your understanding of Functional Programming (FP)?
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Here are 7 rules to remember regarding Java Generics to understand Generics and handle interview and coding questions on Core Java. Object <– Fruit <– (Orange, Mango, etc siblings) Rule 1: Java generics differ from C++ templates. Java generics (at least until JDK 8), … Read more ›...
Q1. How would you go about choosing the right data types for your application? A1. Java is what is known as a strongly typed language. This means Java only accepts specific values within specific variables or parameters. Some languages, such as JavaScript, PHP, … Read more ›...
Java does not have a sizeof operator like C++ does. Java uses automatic memory management known as the Garbage Collection, hence it is not that important to evaluate size of various objects. But, for the purpose of learning & fixing any potential memory issues, I have used “jvisualvm”, … Read...
