Answer 1.
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.
Abstract Class:
1.Abstract Class have Method defination and Implementation
2.It have control the Access Modifiers
3.It does not allow multiple Inheritence
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Answer 2.
this is jaVA concept i don't knou about that...
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