What happens when a thread calls the signalAll method of a Condition object connected to a lock, if no other thread had called await on that Condition object?
A)A compiler error.
B)A checked exception is thrown.
C)The unlock method call will block.
D)Nothing, the program executes normally.

Question

Quizplus · Accepted Answer

If no thread had called await on the Condition object, then there are no threads waiting to be notified, so calling signalAll has no effect and the program executes normally.

What Happens When a Thread Calls the SignalAll Method of a Condition