System Trainee Interview Questions and Answers for Freshers

Polymorphism is the ability of an object to take on multiple forms.

• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• It can be achieved through method overloading or method overriding.

• Example: A parent class Animal can have multiple child classes like Dog, Cat, etc. and all of them can have their own implementation of the same method like makeSound().

• Polymorphism helps in achieving loose coupling and flexibility in code design.

Oops concepts are fundamental to Java programming and include inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of a class from other classes.

• Abstraction allows us to focus on the essential features of an object and ignore the rest.

• Examples inc...read more