Freshers India

A class uses the implements keyword to implement an interface.                        

Checked exceptions should not be declared on implementation methods other than the ones declared by the interface method or subclasses of those declared by the interface method.                        

The signature of the _____________ method and the same return type or subtype should be maintained when overriding the methods.                        

An implementation class itself can be _______________ and if so interface methods need not be implemented.                        

The ___________ keyword is used to extend an interface                        

An interface with no methods in it is referred to as a ______________ interface.