Question

Operating System Questions

14) Fill in the three blanks in the following such that two processes executing the code cannot enter the critical section at the same time. key is a local Boolean variable. The swap function swaps the contents of the two arguments.

do {
key = ______________;

while (key == FALSE) Swap (&lock, &key);

/* critical section */

lock = _____________;

/* remainder section */ } while (TRUE);

lock is a shared Boolean variable initialized to ___________.

15) signal(mutex) without a corresponding wait(mutex) on a binary semaphore mutex can potentially lead to a deadlock. [ TRUE / FALSE ]

Answer 1

Question 14:

do {
key = ____FALSE__________;

while (key == FALSE) Swap (&lock, &key);

/* critical section */

lock = FALSE_____________;

/* remainder section */ } while (TRUE);

lock is a shared Boolean variable initialized to __FALSE_________.

15) signal(mutex) without a corresponding wait(mutex) on a binary semaphore mutex can potentially lead to a deadlock

Answer: Its true with out binary semaphore mutex can lead to deadlock.