Operating System MCQs

1019 MCQs  (Page 38 of 102)

Attempt Operating System Quiz
If a page number is not found in the TLB, then it is known as a ____________
A. Tlb miss
B. Buffer miss
C. Tlb hit
D. All of the mentioned
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An ______ uniquely identifies processes and is used to provide address space protection for that process.
A. Address space locator
B. Address space identifier
C. Address process identifier
D. None of the mentioned
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The percentage of times a page number is found in the TLB is known as ____________
A. Miss ratio
B. Hit ratio
C. Miss percent
D. None of the mentioned
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Memory protection in a paged environment is accomplished by ____________
A. Protection algorithm with each page
B. Restricted access rights to users
C. Restriction on page visibility
D. Protection bit with each page
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When the valid – invalid bit is set to valid, it means that the associated page ____________
A. Is in the tlb
B. Has data in it
C. Is in the process’s logical address space
D. Is the system’s physical address space
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Illegal addresses are trapped using the _____ bit.
A. Error
B. Protection
C. Valid €? invalid
D. Access
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When there is a large logical address space, the best way of paging would be ____________
A. Not to page
B. A two level paging algorithm
C. The page table itself
D. All of the mentioned
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In a paged memory, the page hit ratio is 0.35. The required to access a page in secondary memory is equal to 100 ns. The time required to access a page in primary memory is 10 ns. The average time required to access a page is?
A. 3.0 ns
B. 68.0 ns
C. 68.5 ns
D. 78.5 ns
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In paged memory systems, if the page size is increased, then the internal fragmentation generally ____________
A. Becomes less
B. Becomes more
C. Remains constant
D. None of the mentioned
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When using counters to implement LRU, we replace the page with the ____________
A. Smallest time value
B. Largest time value
C. Greatest size
D. None of the mentioned
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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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