1. Java OOPs Concepts. With examples?

Question

Accepted Answer

Java OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction, essential for object-oriented programming.

Encapsulation: Bundling data and methods. Example: class 'Car' with private variables and public methods to access them.
Inheritance: Mechanism to create new classes from existing ones. Example: 'Sedan' class inherits from 'Car' class.
Polymorphism: Ability to take many forms. Example: method overriding where a subclass provides a specific implementation.
Abstraction: Hiding complex implementation details. Example: using abstract classes and interfaces to define methods without implementation.

Accepted Answer

Object : instance of the class.
Class : Class is a runtime Entity
Inheritance : Inheritance in Java is a mechanism in which one object acquires all the properties and behaviors of a parent object.
Polymorphism : Polymorphism in Java is a concept by which we can perform a single action in different ways.
Abstraction : Abstraction is a process of hiding the implementation details and showing only functionality to the user.
Encapsulation : Encapsulation in Java is a process of wrapping code and data together into a single unit, for example, a capsule which is mixed of several medicines.