Question

Which of these method is used to tell the calling thread to give up a monitor and go to sleep until some other thread enters the same monitor?

(a) wait()

(b) notify()

(c) notifyAll()

(d) sleep()

I had been asked this question in quiz.

My query is from Creating Threads topic in division Multithreading of Java

Answer 1

Correct option is (a) wait()

The best I can explain: wait() method is used to tell the calling thread to give up a monitor and go to sleep until some other thread enters the same monitor. This helps in avoiding polling and minimizes CPU idle time.