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A counting semaphore was initialized to 17. Then 8P (wait) operations and ‘n’V (signal) operations were completed on this semaphore. Find the value of n if total 14 down operations can be carried out successfully after 8 wait operation and n signal operations?
Correct answer is '5'. Can you explain this answer?
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A counting semaphore was initialized to 17. Then 8P (wait) operations ...
Initial value of semaphore = 17
After each wait operation, semaphore value decremented by 1.
8P(wait or down) operations were completed
Semaphore value = 17 - 8 = 9
After each signal operation, semaphore value incremented by 1.
5V(signal or up) operations were completed and resulting value of the semaphore is 14
Semaphore value = 9 + n = 14
which means total 5 signal operations were completed.
Most Upvoted Answer
A counting semaphore was initialized to 17. Then 8P (wait) operations ...
9V (signal) operations were performed on the counting semaphore.
Initially, the counting semaphore was initialized to 17. This means that there were 17 available resources or slots.
The 8P (wait) operations would decrement the counting semaphore by 1 each time, indicating that a resource or slot was being used. The total number of resources used after 8P operations would be 8.
Next, the 9V (signal) operations would increment the counting semaphore by 1 each time, indicating that a resource or slot was being released. The total number of resources released after 9V operations would be 9.
Therefore, after performing 8P and 9V operations on the counting semaphore, there would be a total of 17 - 8 + 9 = 18 available resources or slots.
Initially, the counting semaphore was initialized to 17. This means that there were 17 available resources or slots.
The 8P (wait) operations would decrement the counting semaphore by 1 each time, indicating that a resource or slot was being used. The total number of resources used after 8P operations would be 8.
Next, the 9V (signal) operations would increment the counting semaphore by 1 each time, indicating that a resource or slot was being released. The total number of resources released after 9V operations would be 9.
Therefore, after performing 8P and 9V operations on the counting semaphore, there would be a total of 17 - 8 + 9 = 18 available resources or slots.
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A counting semaphore was initialized to 17. Then 8P (wait) operations and ‘n’V (signal) operations were completed on this semaphore. Find the value of n if total 14 down operations can be carried out successfully after 8 wait operation and n signal operations?Correct answer is '5'. Can you explain this answer?
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