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MCQ

Q.

If the wait for graph contains a cycle ____________

A

then a deadlock does not exist

B

then a deadlock exists

C

then the system is in a safe state

D

either deadlock exists or system is in a safe state

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MCQ

1.

A system is in a safe state only if there exists a ____________

A

safe allocation

B

safe resource

C

safe sequence

D

all of the mentioned

Discussion

MCQ

2.

A system has 3 processes sharing 4 resources. If each process needs a maximum of 2 units then, deadlock ____________

A

can never occur

B

may occur

C

has to occur

D

none of the mentioned

Discussion

MCQ

3.

Given a priori information about the ________ number of resources of each type that maybe requested for each process, it is possible to construct an algorithm that ensures that the system will never enter a deadlock state.

A

minimum

B

average

C

maximum

D

approximate

Discussion

MCQ

4.

The wait-for graph is a deadlock detection algorithm that is applicable when ____________

A

all resources have a single instance

B

all resources have multiple instances

C

all resources have a single 7 multiple instances

D

all of the mentioned

Discussion

MCQ

5.

The signal operation of the semaphore basically works on the basic _______ system call.

A

continue()

B

wakeup()

C

getup()

D

start()

Discussion

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