good nice, online, communication and stuff................................................... ........ Pillar of OOPs, Virtual Function, Friend Function, Friend Class, Types of Inheritance, Why multiple inheritance is not supported in JAVA, Interfaces.
What is Abstraction?
Abstraction is similar to data encapsulation and is very important in OOP. It means showing only the necessary information and hiding the other irrelevant information from the user. Abstraction is implemented using classes and interfaces.