Operating System
Q172.
At a particular time the value of counting semaphore is 10. It will become 7 after:Q173.
Consider a non-negative counting semaphore S. The operation P(S) decrements S, and V(S) increments S. During an execution, 20 P(S) operations and 12V(S) operations are issued in some order. The largest initial value of S for which at least one P(S) operation will remain blocked is ________.Q174.
At a particular time of computation the value of a counting semaphore is 7. Then 20 P operations and x V operations were completed on this semaphore. If the new value of semaphore is 5, x will beQ177.
Which is the correct definition of a valid process transition in an operating system?Q178.
Consider the following threads, T_1, T_2, \text{ and }T_3 executing on a single processor, synchronized using three binary semaphore variables, S_1, S_2, \text{ and }S_3, operated upon using standard wait() and signal(). The threads can be context switched in any order and at any time.Which initialization of the semaphores would print the sequence BCABCABCA ...?Q179.
Consider the following pseudocode, where Sis a semaphore initialized to 5 in line #2 and counter is a shared variable initialized to 0 in line #1. Assume that the increment operation in line #7 is not atomic.1. int counter =0; 2. Semaphore S= init(5); 3. void parop(void) 4. { 5. wait(S); 6. wait(S); 7. counter++; 8. signal(S); 9. signal(S); 10. } If five threads execute the function parop concurrently, which of the following program behavior(s) is/are possible?[MSQ]