Database Management Systems Mcqs

Page No. 39

A magneto-optic disk is :


aprimary storage

✖


bsecondary storage

✖


ctertiary storage

✓


dnone of the mentioned

✖


View Answer tertiary storage

During recovery from a failure


aeach pair of physical block is examined

✓


bspecified pair of physical block is examined

✖


cfirst pair of physical block is examined

✖


dnone of the mentioned

✖



A typical tape drive is ________ a typical disk drive.


amore expensive than

✓


bcheaper than

✖


cof the same cost as

✖


dnone of the mentioned

✖


View Answer more expensive than

Operating system is responsible for


adisk initialization

✖


bbooting from disk

✖


cbad-bock recovery

✖


dall of the mentioned

✓


View Answer all of the mentioned

______________ which increases the number of I/O operations needed to write a single logical block, pays a significant time penalty in terms of write performance.


aRAID level 1

✓


bRAID level 2

✖


cRAID level 5

✖


dRAID level 3

✖


View Answer RAID level 1

___________ is popular for applications such as storage of log files in a database system since it offers the best write performance.


aRAID level 1

✓


bRAID level 2

✖


cRAID level 0

✖


dRAID level 3

✖


View Answer RAID level 1

Hardware RAID implementations permit _________ that is, faulty disks can be removed and replaced by new ones without turning power off.


aScrapping

✖


bSwapping

✖


cHot swapping

✓


dNone of the mentioned

✖


View Answer Hot swapping

______________ partitions data and parity among all N+1 disks, instead of storing data in N-disks and parity in one disk.


aBlock interleaved parity

✖


bBlock interleaved distributed parity

✓


cBit parity

✖


dBit interleaved parity

✖



Where performance and reliability are both important, RAID level ____ is used.


a0

✖


b1

✖


c2

✖


d0+1

✓


View Answer 0+1

The RAID level which mirroring is done along with stripping is


aRAID 1+0

✖


bRAID 0

✖


cRAID 2

✖


dBoth RAID 1+0 and RAID 0

✓



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