What is an interface?

Interface

All of the methods are...

An interface is declared with ____ keyword

Interfaces are implemented using ____ keyword

A class that does not implement all methods declared in the interface must be declared_____

The classes that implement the same interface can be very different but must have _____

Can an interface instantiate variables?

Does the extends clause precede the implements clause?

A class can implement how many interfaces?

Does an interface contain instance variables?