What is similarities/difference between an Abstract class and Interface?

Question

Anoop Singh · Answer

Differences are as follows: Interfaces provide a form of multiple inheritance. A class can extend only one other class. Interfaces are limited to public methods and constants with no implementation. Abstract classes can have a partial implementation, protected parts, static methods, etc.A Class may implement several interfaces. But in case of abstract class, a class may extend only one abstract class.Interfaces are slow as it requires extra indirection to to find corresponding method in in the actual class. Abstract classes are fast. Similarities: Neither Abstract classes or Interface can be instantiated.

interview

What is similarities/difference between an Abstract class and Interface?

Anoop Singh

Can you answer this question?

1 Answers

Liked By