Mass Storage Structure
Multiple Choice questions & answers are available for a Computer Science students to clear GAT, NTS, ECAT exams, various technical interview, competitive examination, and other entrance exam. Mass Storage Structure is the important Topic for a computer science and technical students and one should practice these Mcqs to grasp good knowledge on the topic.
17. The time taken to move the disk arm to the desired cylinder is called the :
Positioning time
Random access time
Seek time
Rotational latency
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18. The time taken for the desired sector to rotate to the disk head is called :
Positioning time
Random access time
Seek time
Rotational latency
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19. When the head damages the magnetic surface, it is known as _________
Disk crash
Head crash
Magnetic damage
All of the mentioned
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20. A floppy disk is designed to rotate ___________ as compared to a hard disk drive.
Faster
Slower
At the same speed
None of the mentioned
21. The host controller is :
Controller built at the end of each disk
Controller at the computer end of the bus
All of the mentioned
None of the mentioned
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22. ______ controller sends the command placed into it, via messages to the _____ controller.
Host, host
Disk, disk
Host, disk
Disk, host
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23. The disk bandwidth is :
The total number of bytes transferred
Total time between the first request for service and the completion on the last transfer
The total number of bytes transferred divided by the total time between the first request for service and the completion on the last transfer
None of the mentioned
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24. Whenever a process needs I/O to or from a disk it issues a ______________
System call to the CPU
System call to the operating system
A special procedure
All of the mentioned
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25. If a process needs I/O to or from a disk, and if the drive or controller is busy then :
The request will be placed in the queue of pending requests for that drive
The request will not be processed and will be ignored completely
The request will be not be placed
None of the mentioned
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26. Consider a disk queue with requests for I/O to blocks on cylinders :98 183 37 122 14 124 65 67Considering SSTF (shortest seek time first) scheduling, the total number of head movements is, if the disk head is initially at 53 :
600
620
630
640
27. Random access in magnetic tapes is _________ compared to magnetic disks.
Fast
Very fast
Slow
Very slow
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28. Magnetic tape drives can write data at a speed ________ disk drives.
Much lesser than
Comparable to
Much faster than
None of the mentioned
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29. On media that use constant linear velocity (CLV), the _____________ is uniform.
Density of bits on the disk
Density of bits per sector
The density of bits per track
None of the mentioned
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30. SSTF algorithm, like SJF __________ of some requests.
May cause starvation
Will cause starvation
Does not cause starvation
Causes aging
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