Database Management Systems Mcqs

Page No. 40

Which one of the following is a Stripping technique?


aByte level stripping

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bRaid level stripping

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cDisk level stripping

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dBlock level stripping

✓


View Answer Block level stripping

With multiple disks, we can improve the transfer rate as well by ___________ data across multiple disks.


aStriping

✓


bDividing

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cMirroring

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dDividing

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View Answer Striping

Optical disk technology uses


aHelical scanning

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bDAT

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cA laser beam

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dRAID

✓


View Answer RAID

Which level of RAID refers to disk mirroring with block striping?


aRAID level 1

✓


bRAID level 2

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cRAID level 0

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dRAID level 3

✖


View Answer RAID level 1

Hybrid disk drives are hard-disk systems that combine magnetic storage with a smaller amount of flash memory, which is used as a cache for frequently accessed data.


aHybrid drivers

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bDisk drivers

✓


cHybrid disk drivers

✖


dAll of the mentioned

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View Answer Disk drivers

In Flash memory, the erase operation can be performed on a number of pages, called an _______ at once, and takes about 1 to 2 milliseconds.


aDelete block

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bErase block

✓


cFlash block

✖


dRead block

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View Answer Erase block

Once the head has reached the desired track, the time spent waiting for the sector to be accessed to appear under the head is called the _______________


aAccess time

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bAverage seek time

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cSeek time

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dRotational latency time

✓



_________ is around one-half of the maximum seek time.


aAccess time

✖


bAverage seek time

✓


cSeek time

✖


dRotational latency time

✖


View Answer Average seek time

The time for repositioning the arm is called the ________ and it increases with the distance that the arm must move.


aAccess time

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bAverage seek time

✖


cSeek time

✓


dRotational latency time

✖


View Answer Seek time

_________ is the time from when a read or write request is issued to when data transfer begins.


aAccess time

✓


bAverage seek time

✖


cSeek time

✖


dRotational latency time

✖


View Answer Access time

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