Database Management Systems Mcqs

Page No. 40

Which one of the following is a Stripping technique?


aByte level stripping


bRaid level stripping


cDisk level stripping


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


cMirroring


dDividing


View Answer Striping

Optical disk technology uses


aHelical scanning


bDAT


cA laser beam


dRAID


View Answer RAID

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


aRAID level 1


bRAID level 2


cRAID level 0


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


bDisk drivers


cHybrid disk drivers


dAll of the mentioned


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


bErase block


cFlash block


dRead block


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


bAverage seek time


cSeek time


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


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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