Java Quizzes Java Language Input Output

Question:
Which is the way in which a thread can enter the waiting state?

Option A):
Invoke its suspend() method.
Option B):
invoke object's wait method.
Option C):
Invoke its sleep() method.
Option D):
All of these

Correct Answer is Option D):
All of these

Explanation:
A thread can enter the waiting state by invoking its sleep() method, by blocking on IO, by unsuccessfully attempting to acquire an object's lock, or by invoking an object's wait() method. It can also enter the waiting state by invoking its (deprecated) suspend() method.