Define method overiding What is abstract class

Question

Accepted Answer

Method overriding is when a subclass provides its own implementation of a method that is already defined in its superclass.

Method overriding is used to achieve runtime polymorphism in Java.
The method signature (name, parameters, return type) must be the same in both the superclass and subclass.
The access level of the overriding method cannot be more restrictive than the overridden method.
Example: public class Animal { public void makeSound() { System.out.println("Animal is making a sound"); } } public class Dog extends Animal { public void makeSound() { System.out.println("Dog is barking"); } }
An abstract class is a class that cannot be instantiated and is meant to be subclassed.
An abstract class can have both abstract and non-abstract methods.
Abstract methods are declared without an implementation and must be implemented by any concrete subclass.
Example: public abstract class Shape { public abstract double area(); public void printArea() { System.out.println("Area: " + area()); } } public class Circle extends Shape { private double radius; public Circle(double radius) { this.radius = radius; } public double area() { return Math.PI * radius * radius; } }

Top Protechsoft Technologies Java Developer interview questions & answers