A counting semaphore is initialized to 4. Then 2 wait and 7 signal operation were completed on this semaphore. What is the resulting value of the semaphore?
1
2
2
0
3
7
4
9
A counting semaphore is initialized to 4. Then 2 wait and 7 signal operation were completed on this semaphore. What is the resulting value of the semaphore?
2
0
7
9