Operating System MCQs

1019 MCQs  (Page 25 of 102)

Attempt Operating System Quiz
When a page is selected for replacement, and its modify bit is set ____________
A. The page is clean
B. The page has been modified since it was read in from the disk
C. The page is dirty
D. The page has been modified since it was read in from the disk & page is dirty
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The aim of creating page replacement algorithms is to ____________
A. Replace pages faster
B. Increase the page fault rate
C. Decrease the page fault rate
D. To allocate multiple pages to processes
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What is the Optimal page – replacement algorithm?
A. Replace the page that has not been used for a long time
B. Replace the page that has been used for a long time
C. Replace the page that will not be used for a long time
D. None of the mentioned
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Optimal page – replacement algorithm is difficult to implement, because ____________
A. It requires a lot of information
B. It requires future knowledge of the reference string
C. It is too complex
D. It is extremely expensive
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LRU page – replacement algorithm associates with each page the ______
A. Time it was brought into memory
B. The time of that page’s last use
C. Page after and before it
D. All of the mentioned
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For 3 page frames, the following is the reference string: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1 How many page faults does the LRU page replacement algorithm produce?
A. 10
B. 15
C. 11
D. 12
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What are the two methods of the LRU page replacement policy that can be implemented in hardware?
A. Counters
B. Ram & registers
C. Stack & counters
D. Registers
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Data cannot be written to secondary storage unless written within a ______
A. File
B. Swap space
C. Directory
D. Text format
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File attributes consist of ____________
A. Name
B. Type
C. Identifier
D. All of the mentioned
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A file is a/an _______ data type.
A. Abstract
B. Primitive
C. Public
D. Private
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Word of the Day
12 Jul
Obdurate
stubbornly refusing to change one’s opinion or course of action.
ضدی، بدکار، سنگدلی

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