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MCQ

Q.

In the bounded buffer problem, there are the empty and full semaphores that ____________

A

count the number of empty and full buffers

B

count the number of empty and full memory spaces

C

count the number of empty and full queues

D

none of the mentioned

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MCQ

1.

A semaphore is a shared integer variable __________

A

that can not drop below zero

B

that can not be more than zero

C

that can not drop below one

D

that can not be more than one

Discussion

MCQ

2.

Serializable schedules are ones where ____________

A

concurrent execution of transactions is equivalent to the transactions executed serially

B

the transactions can be carried out one after the other

C

a valid result occurs after execution transactions

D

none of the mentioned

Discussion

MCQ

3.

What is a semaphore?

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

Discussion

MCQ

4.

In the write ahead logging a _____________ is maintained.

A

a memory

B

a system

C

a disk

D

a log record

Discussion

MCQ

5.

The shrinking phase is a phase in which?

A

A transaction may obtain locks, but does not release any

B

A transaction may obtain locks, and releases a few or all of them

C

A transaction may release locks, but does not obtain any new locks

D

A transaction may release locks, and does obtain new locks

Discussion

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