What is meant by polymorphism? What are the different types of polymorphism and explain them with an example?

Question

Accepted Answer

Polymorphism in Java refers to the ability of a single method to perform different actions based on the object it is acting upon.

Types of polymorphism: compile-time polymorphism (method overloading) and runtime polymorphism (method overriding)
Method overloading: multiple methods in the same class with the same name but different parameters
Example of method overloading: public void display(int a) and public void display(int a, int b)
Method overriding: a subclass provides a specific implementation of a method that is already provided by its superclass
Example of method overriding: public class Animal { public void sound() { System.out.println("Animal makes a sound"); } } public class Dog extends Animal { @Override public void sound() { System.out.println("Dog barks"); } }

Top Endava Associate Java Developer interview questions & answers