Polymarphism interview questions and answers in java
Polymorphism is one of the Oops concept and mostly used feature in java. The ability of an object to take more than one form is called Polymorphism. The most common use of polymorphism in OOPs occurs when a parent class reference is used to refer to a child class object. It is impossible to know that the only possible way to access the object is through a reference variable. A reference variable can be of only one type. Once declared, the type of the reference variable cannot be changed. A reference variable can refer to any object of its declared type or any subtype of its declared type. A reference variable can be declared as a class or interface. Ex: Let's take a look into the below example 1 2 3 4 5 interface Vehicle {} class Mileage {} public class Car extends Mileage implements Vehicle {} see the implementation of the above example, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ...