If a page fault occurs but all frames are filled, the requested page will __ be
ID: 3720911 • Letter: I
Question
If a page fault occurs but all frames are filled, the requested page will __
be pushed onto the stack or the process control block until a frame becomes available
be swapped out to the swap space of the hard drive
be terminated or masked so a higher priority process is not interrupted
overwrite an unwanted page in memory which has been copied to the swap space
Repeated uncontrollable page faulting is called thrashing, caused by repeatedly swapping pages out of RAM only to have those pages called for immediately after. You need to find a means by which this problem can be solved. Your choices are i) terminate an application whenever thrashing occurs; ii) Add more real memory; iii) increase virtual memory iv) get a faster hard drive. Which is the best choice?
i) as a short-term measure, and ii) as a long-term measure, but not iii) or iv).
ii) as a short-term measure, and iii) as a long-term measure, but not i) or iv)
iii) as a short-term measure, but not i) or ii) or iv)
None of the suggestions given is appropriate.
be pushed onto the stack or the process control block until a frame becomes available
be swapped out to the swap space of the hard drive
be terminated or masked so a higher priority process is not interrupted
overwrite an unwanted page in memory which has been copied to the swap space
Repeated uncontrollable page faulting is called thrashing, caused by repeatedly swapping pages out of RAM only to have those pages called for immediately after. You need to find a means by which this problem can be solved. Your choices are i) terminate an application whenever thrashing occurs; ii) Add more real memory; iii) increase virtual memory iv) get a faster hard drive. Which is the best choice?
i) as a short-term measure, and ii) as a long-term measure, but not iii) or iv).
ii) as a short-term measure, and iii) as a long-term measure, but not i) or iv)
iii) as a short-term measure, but not i) or ii) or iv)
None of the suggestions given is appropriate.
Explanation / Answer
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1.
If a page fault occurs but all frames are filled, the requested page will
answer: be swapped out to the swap space of the hard drive
explaination: when a page fault occurs and frames are full, the requested page is put into swap sapce untill a frame is made empty. As soon as cpu makes a frame empty it brings in requestd page.
we do not mask it , since we need that page and hence a page fault has occurred nor we put it on stack.
2.
Repeated uncontrollable page faulting is called thrashing, caused by repeatedly swapping pages out of RAM only to have those pages called for immediately after. You need to find a means by which this problem can be solved. Your choices are i) terminate an application whenever thrashing occurs; ii) Add more real memory; iii) increase virtual memory iv) get a faster hard drive. Which is the best choice?
i) as a short-term measure, and ii) as a long-term measure, but not iii) or iv).
ii) as a short-term measure, and iii) as a long-term measure, but not i) or iv)
iii) as a short-term measure, but not i) or ii) or iv)
None of the suggestions given is appropriate.
answer:
i) as a short-term measure, and ii) as a long-term measure, but not iii) or iv).
explaination:
thrashing : when lots of page faults occur hence consuming lot of cpu time therbeby decreasing the performance of system.
we can avoid thrashing for short term by terminating programs because it will empty frames in main memory
if we increase main memory then the number of frames will increase there by avoiding thrashing for long term.
but increasing virtual memory and getting a faster hard drive wont help because it is the shortage of main memory that is causing thrashing.
answer: be swapped out to the swap space of the hard drive
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