Skip to contentSkip to footer

Softwareentwickler Backend Interview Questions

Salaries
Interviews

512,316 softwareentwickler backend interview questions shared by candidates

Consider a queue between the two processes indicated below. N is the capacity (maximum length) of the queue; e, f, and b are semaphores. "P" refers to the operation of acquiring (decrementing) a semaphore, and "V" refers to the operation of releasing (incrementing) a semaphore. init() { e = N; f = 0; b = 1; queue = EMPTY; } process1() { for(;;) { P(e); P(b); queue.enqueue(...); V(b); V(f); } } process2() { for(;;) { P(f); P(b); ... = queue.dequeue(); V(b); V(e); } } Which of the following statements is (are) true? (Zero or more may be correct.) a. The purpose of semaphore f is to ensure that dequeue is not executed on an empty queue. b. The purpose of semaphore e is to ensure that deadlock does not occur. c. The purpose of semaphore b is to provide mutual exclusion for queue operations. d. None of the above.
avatar

Software Engineer

Interviewed at Everpure

3.5★
Apr 30, 2011

Consider a queue between the two processes indicated below. N is the capacity (maximum length) of the queue; e, f, and b are semaphores. "P" refers to the operation of acquiring (decrementing) a semaphore, and "V" refers to the operation of releasing (incrementing) a semaphore. init() { e = N; f = 0; b = 1; queue = EMPTY; } process1() { for(;;) { P(e); P(b); queue.enqueue(...); V(b); V(f); } } process2() { for(;;) { P(f); P(b); ... = queue.dequeue(); V(b); V(e); } } Which of the following statements is (are) true? (Zero or more may be correct.) a. The purpose of semaphore f is to ensure that dequeue is not executed on an empty queue. b. The purpose of semaphore e is to ensure that deadlock does not occur. c. The purpose of semaphore b is to provide mutual exclusion for queue operations. d. None of the above.

Viewing 571 - 580 interview questions

Glassdoor has 512,316 interview questions and reports from Softwareentwickler backend interviews. Prepare for your interview. Get hired. Love your job.