By Team foundit
April 17 , 2025
Prepare for your Java interviews! Here's a list of top questions freshers often face, with easy explanations to boost your confidence.
Java is a high-level, platform-independent language used to build web, mobile, and enterprise apps. It follows the object-oriented model.
JVM runs Java bytecode, JDK is for developing Java apps, and JRE provides an environment to run them. All three work together in Java.
The main() method is the entry point of any Java program. It is written as public static void main(String[] args).
Overloading means same method name with different parameters. Overriding means redefining a parent class method in a child class.
Inheritance allows a class to acquire features from another class, making code reuse easy and logical. Supports "is-a" relationship.
Polymorphism allows an object to behave differently based on context. It supports flexibility and easier maintenance in Java programs.
Encapsulation binds data and methods in one unit, like a capsule. For example, private variables with public getters and setters.
It is a set of classes and interfaces like List, Set, Map to store, retrieve, and manipulate data easily in Java.
Focus on OOPs, practice programs, understand basics like Collections, Exception Handling, and write clean code to succeed!