Interface:
1.Interface has only Signature.
2. All the Methods are Public, It doesn't have access Modifier Controls
3.It have used Multiple inheritance 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 definition and Implementation
2.It have control the Access Modifiers
3.It does not allow multiple Inheritance
4.Some methods are concrete
5. It have Constructor and destructor
6.Only one abstract have to derived