Storage Management Questions

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211.

The time taken for the desired sector to rotate to the disk head is called ____________

A

positioning time

B

random access time

C

seek time

D

rotational latency

Correct Answer: D

None.

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212.

When the head damages the magnetic surface, it is known as _________

A

disk crash

B

head crash

C

magnetic damage

D

all of the mentioned

Correct Answer: B

None.

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213.

A floppy disk is designed to rotate ___________ as compared to a hard disk drive.

A

faster

B

slower

C

at the same speed

D

none of the mentioned

Correct Answer: B

None.

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214.

What is the host controller?

A

controller built at the end of each disk

B

controller at the computer end of the bus

C

all of the mentioned

D

none of the mentioned

Correct Answer: B

None.

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215.

______ controller sends the command placed into it, via messages to the _____ controller.

A

host, host

B

disk, disk

C

host, disk

D

disk, host

Correct Answer: C

None.

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216.

What is the disk bandwidth?

A

the total number of bytes transferred

B

total time between the first request for service and the completion on the last transfer

C

the total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer

D

none of the mentioned

Correct Answer: C

None.

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217.

Whenever a process needs I/O to or from a disk it issues a ______________

A

system call to the CPU

B

system call to the operating system

C

a special procedure

D

all of the mentioned

Correct Answer: B

None.

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218.

If a process needs I/O to or from a disk, and if the drive or controller is busy then ____________

A

the request will be placed in the queue of pending requests for that drive

B

the request will not be processed and will be ignored completely

C

the request will be not be placed

D

none of the mentioned

Correct Answer: A

None.

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219.

Consider a disk queue with requests for I/O to blocks on cylinders. 98 183 37 122 14 124 65 67 Considering FCFS (first cum first served) scheduling, the total number of head movements is, if the disk head is initially at 53 is?

A

600

B

620

C

630

D

640

Correct Answer: D

None.

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220.

Consider a disk queue with requests for I/O to blocks on cylinders. 98 183 37 122 14 124 65 67 Considering SSTF (shortest seek time first) scheduling, the total number of head movements is, if the disk head is initially at 53 is?

A

224

B

236

C

245

D

240

Correct Answer: B

None.

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