Operating System Mcqs

Page No. 64

The valid – invalid bit, in this case, when valid indicates?


athe page is not legal

✖


bthe page is illegal

✖


cthe page is in memory

✓


dthe page is not in memory

✖


View Answer the page is in memory

Using a pager ____________


aincreases the swap time

✖


bdecreases the swap time

✖


cdecreases the swap time & amount of physical memory needed

✓


dincreases the amount of physical memory needed

✖



A swapper manipulates ___________ whereas the pager is concerned with individual _______ of a process.


athe entire process, parts

✖


ball the pages of a process, segments

✖


cthe entire process, pages

✓


dnone of the mentioned

✖



Segment replacement algorithms are more complex than page replacement algorithms because ____________


aSegments are better than pages

✖


bPages are better than segments

✖


cSegments have variable sizes

✓


dSegments have fixed sizes

✖



Virtual memory is normally implemented by ________


ademand paging

✓


bbuses

✖


cvirtualization

✖


dall of the mentioned

✖


View Answer demand paging

In virtual memory. the programmer __________ of overlays.


ahas to take care

✖


bdoes not have to take care

✓


call of the mentioned

✖


dnone of the mentioned

✖



The ability to execute a program that is only partially in memory has benefits like ____________


aThe amount of physical memory cannot put a constraint on the program

✖


bPrograms for an extremely large virtual space can be created

✖


cThroughput increases

✖


dAll of the mentioned

✓


View Answer All of the mentioned

Error handler codes, to handle unusual errors are ____________


aalmost never executed

✓


bexecuted very often

✖


cexecuted periodically

✖


dnone of the mentioned

✖


View Answer almost never executed

The instruction being executed, must be in ____________


aphysical memory

✓


blogical memory

✖


cphysical & logical memory

✖


dnone of the mentioned

✖


View Answer physical memory

Virtual memory allows ____________


aexecution of a process that may not be completely in memory

✓


ba program to be smaller than the physical memory

✖


ca program to be larger than the secondary storage

✖


dexecution of a process without being in physical memory

✖



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