Core Java Interview Questions and Answers — Get Java Interview-Ready

If you’re preparing for a Java interview, it’s important to have a good understanding of Core Java concepts. These topics are commonly asked in technical interviews for both beginners and experienced developers.

In this article, we have listed 50 Core Java interview questions and answers to help you review key concepts and improve your confidence. The questions cover important areas like object-oriented programming, exception handling, collections, multithreading, and more.

This guide is designed to support your interview preparation by giving you clear and practical answers to common questions. Let’s get started.

1. What is Java?

Java is a high-level, object-oriented programming language that is designed to be platform-independent, meaning you can write code once and run it anywhere with the Java Virtual Machine (JVM).

It’s easy to learn for beginners and widely used for building web, mobile, and enterprise applications. Java is known for its robustness, security features, and versatility. It supports modular and reusable code through its object-oriented principles, and it comes with a rich set of libraries and frameworks to streamline development.