An abstract class may not be declared as final.
No, an abstract class cannot be declared as final in Java. The final keyword in Java is used to indicate that a class cannot be subclassed, and an abstract class is meant to be subclassed. By making a class final, you prevent any further extension or inheritance.
On the other hand, an abstract class is designed to be extended by other classes, and it is meant to be a base class for other classes. Therefore, marking an abstract class as final would be contradictory, and the Java compiler would raise an error if you attempt to do so.