Question

What is an abstract class?

a) a class that has direct instances, but whose descendants may have direct instances.

b) a class that has direct instances, but whose descendants may not have direct instances.

c) a class that has no direct instances, but whose descendants may have direct instances.

Answer 1

c) a class that has no direct instances, but whose descendants may have direct instances.

Answer 2

An abstract class in Java is a class that cannot be instantiated. It is meant to be subclassed, and it provides a common interface for its subclasses. Abstract classes can contain abstract methods, which are methods with no implementation.