Data Structures Algorithms-II MCQs

Page No. 145

Consider a reference string: 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 4. Using FIFO algorithm, determine the number of page faults.


a12

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b16

✖


c10

✓


d14

✖


View Answer 10

Consider a reference string: 7,0,1,2,0,3,0,4,2,3,0,3,2,1,2,0,1,7,0,1 of frame size 3. Using FIFO algorithm, determine the number of page faults.


a12

✖


b16

✖


c14

✖


d15

✓


View Answer 15

Under which of the following scenarios is page replacement algorithm required?


aWhen total memory exceeds physical memory

✓


bTo determine the number of frames for each process

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cWhen paging and segmentation are to be used

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dExecution of a process, not in memory

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What is the competitive analysis of the FIFO algorithm?


ak/k+1

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bk+1

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ck(k+1)

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dk/(k-h+1)

✓


View Answer k/(k-h+1)

FIFO algorithm is used by __________ operating system.


aLinux

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bMac

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cWindows

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dVAX/VMS

✓


View Answer VAX/VMS

The cost required to execute a FIFO algorithm is expensive.


aTrue

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bFalse

✓


cA & B

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d None of these

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View Answer False

In a FIFO algorithm, when a page is to be replaced, which of the following page is chosen?


aOldest page

✓


bNewest page

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cFrequently occurred page in past

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dFrequently occurred page in future

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View Answer Oldest page

Which of the following is required to determine the number of page faults in FIFO?


aPage number

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bPage frame number

✓


cMemory capacity

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dSegment number

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View Answer Page frame number

Which of the following is the main drawback of FIFO page replacement algorithm?


aRequirement of large memory

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bFrame allocation

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cReduction in multiprogramming

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dReduced optimality

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Which of the following page replacement algorithms return the minimum number of page faults?


aLRU replacement algorithm

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bOptimal page replacement algorithm

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cFIFO

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dCounting based replacement

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