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Computer Science Set-1
Operating System
63

Operating System MCQ with Answers

63) Consider a logical address space of 8 pages of 1024 words mapped into memory of 32 frames.How many bits are there in the physical address?

9 bits

11 bits

13 bits

15 bits

Answer is:

15 bits

Operating System MCQ with Answers

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Related Operating System MCQ with Answers

64) Which of the following refers to the associative memory?

Address of the data is generated by the CPU

Address of the data is supplied by the users.

There is no need for an address ie the data is used as an address

Data are accessed sequentially

Answer is:

There is no need for an address ie the data is used as an address

65) In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the RUNNING state to the

BLOCKED state

READY state

SUSPENDED state

TERMINATED state

Answer is:

READY state

66) Mutual exclusion problem occurs between

two disjoint processes that do not interact

processes that share resources

processes that do not use the same resource

none of these

Answer is:

processes that share resources

67) A file server uses a form of locking as a concurrency control technique. When a file is locked by a client, all attempts to use or lock the file by other clients are prevented by the server. A potential problem exists if a client requests a lock on a file and then crashes. This situation could result in the file being locked indefinitely. To prevent this from occurring, the file server starts a time whenever it sets a lock. If the timer runs out before the file is unlocked the server assumes that the client

It provides a solution to the problem of preventing indefinite lockout.

It may result in interleaved access to a file by two or more clients.

It will guarantee mutual exclusion.

It will fail to guarantee the prevention of indefinite lockout

Answer is:

It provides a solution to the problem of preventing indefinite lockout.

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