Operating System (OS)
Semaphores

are used for memory management
are used to do I/O
synchronize critical resources to prevent deadlock
None of these
synchronize critical resources to prevent contention

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
You should choose sleep option when

You finish working and going to bed
You are leaving for a very short time and want to resume you work shortly
The computer is tired after working for the whole day
When computer gets hanged frequently. Let it sleep for some time

ANSWER DOWNLOAD EXAMIANS APP