In Java an abstract class cannot be sub-classed

? True

? False

False

Explanation:

An abstract class is a class declared abstract - it may or may not include abstract techniques. It is not possible to instantiate abstract classes, but they can be sub-classed.

Abstract method declaration

abstract void moveTo (double X, double Y);

Usually the subclass offers solutions for all of the abstract techniques in its parent class when an abstract class is sub-classed. If not, however, the subclass must be declared abstract as well.

Example

public abstract class GraphicObject {

/ / declaring fields

/ / declaring non-abstract methods

abstract void draw ();

}