What is Difference Between Interface and abstract Class
Interface :
1.Interface have only Signature.
2.All the Methods are Public , It doesn't have access Modifier Controls
3.It have used Multiple inheritence in the Object oriented Language
4.All the Methods are Abstract.
5.It does not have Contructor,destructor,Fileds
6.A Class May inherits several Interfaces

Abstract Class:
1.Abstract Class have Method defination and Implementation
2.It have control the Access Modifiers
3.It does not allow multiple Inheritence
4.Some methods are concrete
5. It have Contructor and destructor
6.Only one abstract have to derived