Consider a queue between the two processes indicated below. A/is the length of queue and e, f and b are semaphore, init : e : = N;f = 0; b : = 1;Which of the following statements is/are true?1. The purpose of semaphore f is to ensure that dequeue is not executed on an empty queue.2. The purpose of semaphore e is to ensure that deadlock does not occur.3. The purpose of semaphore b is to provide mutual exclusion for queue operations.a)1 onlyb)2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'C'. Can you explain this answer? - EduRev Computer Science Engineering (CSE) Question

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Consider a queue between the two processes indicated below. A/is the length of queue and e, f and b are semaphore, init : e : = N; f = 0; b : = 1;

Which of the following statements is/are true?
1. The purpose of semaphore f is to ensure that dequeue is not executed on an empty queue.
2. The purpose of semaphore e is to ensure that deadlock does not occur.
3. The purpose of semaphore b is to provide mutual exclusion for queue operations.

a)
1 only
b)
2 only
c)
1 and 3 only
d)
2 and 3 only

Correct answer is option 'C'. Can you explain this answer?

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Consider a queue between the two processes indicated below. A/is the l...

e = N=> empty = N [The complete array is empty initially]
f= 0 = > full = 1 [No item is there in the array] b = 1 => Only one process can execute at a time

The purpose of semaphore 'f' is to ensure that dequeue is not executed on an empty queue. Process 2 will block itself on first statement i.e. p(t).
The purpose of semaphore ‘e’ is to ensure that not more than N elements being present in queue or if N element are already there in queue, process 1 must block itself.
The purpose of semaphore ‘b’ is to ensure mutual exclusion for queue operations.

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Consider a queue between the two processes indicated below. A/is the length of queue and e, f and b are semaphore, init : e : = N;f = 0; b : = 1;Which of the following statements is/are true?1. The purpose of semaphore f is to ensure that dequeue is not executed on an empty queue.2. The purpose of semaphore e is to ensure that deadlock does not occur.3. The purpose of semaphore b is to provide mutual exclusion for queue operations.a)1 onlyb)2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'C'. Can you explain this answer?

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