The document lists basic Java interview questions covering key concepts such as the features of Java, differences between JDK, JRE, and JVM, and object-oriented programming concepts. It also addresses access modifiers, constructors, and the distinction between '==' and '.equals()'. Additionally, it touches on Java syntax, data types, exception handling, the collection framework, and multithreading basics.

1. Java Basic Interview Questions

2. • Java is a high-level, object-
oriented programming
language.
• Platform-independent
(Write Once, Run
Anywhere).
• Widely used for web,
mobile, and enterprise
applications.
What is Java?

3. • What are the features of Java?
• Object-Oriented, Robust,
Multithreaded, etc.
• What is the difference between JDK,
JRE, and JVM?
• JDK: Development Kit; JRE: Runtime
Environment; JVM: Runs Java bytecode.
• Explain the concept of OOP in Java.
• Inheritance, Polymorphism,
Abstraction, and Encapsulation.
Core Java Questions

4. • Explain access modifiers in Java.
• public, private, protected, default.
• What is a Constructor?
• Special method used to initialize
objects.
• Explain the difference between ‘==’
and .equals().== checks reference
equality; .equals() checks value
equality.
Java Syntax and Key Concepts

5. • Data Types and Variables
• Exception Handling (try-
catch-finally)
• Collection Framework (List,
Set, Map)
• Threads and
Multithreading Basics
Frequently Asked Topics