NTA UGC NET JUNE-2023 Paper-2
December 27, 2023Question 8919 – ISRO CS 2020
December 28, 2023Operating-Systems
| Question 19 |
function OWNRESOURCE(Resource R)
Acquire lock L // a global lock
if R is available then
Acquire R
Release lock L
else
if R is owned by another process P then
Terminate P, after releasing all resources owned by P
Acquire R
Restart P
Release lock L
end if
end if
end function
Which of the following choice(s) about the above scheme is/are correct?
| The scheme ensures that deadlocks will not occur. | |
| The scheme may lead to live-lock. | |
| The scheme violates the mutual exclusive property. | |
| The scheme may lead to starvation. |
(1) True,
The scheme ensures deadlock free operation, as there is no hold-and-wait condition possible.
(2) True,
The scheme may lead to priority inversion problems, and hence livelock is possible.
(3) False,
Mutual exclusion is satisfied as only one process can acquire and release locks at a time.
(4) True,
The scheme may lead to starvation. For example, the priority process can get scheduled repeatedly and keeps on killing the lower priority processes. Hence, a low priority process may strave.
(1) True,
The scheme ensures deadlock free operation, as there is no hold-and-wait condition possible.
(2) True,
The scheme may lead to priority inversion problems, and hence livelock is possible.
(3) False,
Mutual exclusion is satisfied as only one process can acquire and release locks at a time.
(4) True,
The scheme may lead to starvation. For example, the priority process can get scheduled repeatedly and keeps on killing the lower priority processes. Hence, a low priority process may strave.