Top 550+ Solved Operating System (OS) MCQ Questions Answer

a. hardware for a system

b. special program for a system

c. integer variable

d. none of the mentioned

a. wait

b. stop

c. hold

d. none of the mentioned

a. cpu cycles wasting locks over critical sections of programs

b. locks that avoid time wastage in context switches

c. locks that work better on multiprocessor systems

d. all of the mentioned

a. they are not sufficient for many process

b. they require busy waiting

c. they are unreliable sometimes

d. they are too complex for programmers

a. stop()

b. block()

c. hold()

d. wait()

a. continue()

b. wakeup()

c. getup()

d. start()

a. its magnitude is the number of processes waiting on that semaphore

b. it is invalid

c. no operation can be further performed on it until the signal operation is performed on it

d. none of the mentioned

a. remainder section code

b. non – critical section code

c. critical section code

d. none of the mentioned

a. starvation

b. deadlock

c. aging

d. signaling

a. is a binary mutex

b. must be accessed from only one process

c. can be accessed from multiple processes

d. none of the mentioned

a. mutex & counting

b. binary & counting

c. counting & decimal

d. decimal & binary

a. is a binary mutex

b. must be accessed from only one process

c. can be accessed from multiple processes

d. none of the mentioned

a. 1

b. -1 c) 0.8 d) 0.5

a. system calls

b. ipc mechanisms

c. system protection

d. none of the mentioned

a. readers – writers problem

b. dining – philosophers problem

c. producer – consumer problem

d. none of the mentioned