Java interview Questions and Answers
What are the Principal Concepts of OOPS? Object-Oriented Programming (OOP) is based on four principal concepts: Abstraction : Abstraction refers to the act of representing essential features without including the background details or explanations. Encapsulation : Encapsulation is a technique used for hiding the properties and behaviors of an object and allowing outside access only as appropriate. It prevents other objects from directly altering or accessing the properties or methods of the encapsulated object. Polymorphism : Polymorphism is the ability to create a variable, a method, or an object that has more than one form. Inheritance : Inheritance is the process by which objects of one class acquire the properties of objects of another class. Differences Between Abstraction and Encapsulation? Abstraction and encapsulation are complementary concepts: Abstraction focuses on the behavior of an object. Encapsulation focuses on the implementation of an object’s behavior by hiding th...