When to use an interface instead of an abstract class and vice versa?

Question

This may be a generic OOP question. I wanted to do a generic comparison between an interface and an abstract class on the basis of their usage.

When wou

Answer 1

1.If you are creating something that provides common functionality to unrelated classes, use an interface.

2.If you are creating something for objects that are closely related in a hierarchy, use an abstract class.