Storage Management Questions

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181.

_______ tend to represent a major bottleneck in system performance.

A

CPUs

B

Disks

C

Programs

D

I/O

Correct Answer: B

None.

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182.

In UNIX, even an

A

programs

B

inodes

C

virtual memory

D

stacks

Correct Answer: B

None.

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183.

By preallocating the inodes and spreading them across the volume, we ___________ the system performance.

A

improve

B

decrease

C

maintain

D

do not affect

Correct Answer: A

None.

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184.

____________ writes occur in the order in which the disk subsystem receives them, and the writes are not buffered.

A

Asynchronous

B

Regular

C

Synchronous

D

Irregular

Correct Answer: C

None.

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185.

In ___________ writes, the data is stored in the cache.

A

Asynchronous

B

Regular

C

Synchronous

D

Irregular

Correct Answer: A

None.

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186.

A file being read or written sequentially should not have its pages replaced in LRU order, because _____________

A

it is very costly

B

the most recently used page will be used last

C

it is not efficient

D

all of the mentioned

Correct Answer: B

None.

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187.

In the optimized technique for sequential access ___________ removes a page from the buffer as soon as the next page is requested.

A

write ahead

B

read ahead

C

free-behind

D

add-front

Correct Answer: C

None.

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188.

With _______ a requested page and several subsequent pages are read and cached.

A

write ahead

B

read ahead

C

free-behind

D

add-front

Correct Answer: B

None.

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189.

Some directory information is kept in main memory or cache to ___________

A

fill up the cache

B

increase free space in secondary storage

C

decrease free space in secondary storage

D

speed up access

Correct Answer: D

None.

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190.

A systems program such as fsck in ______ is a consistency checker.

A

UNIX

B

Windows

C

Macintosh

D

Solaris

Correct Answer: A

None.

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