Operating System (OS)
Swapping

does not work with overlaying
allows each program in turn to use the memory
None of these
allows many programs to use memory simultaneously
works best with many small partitions

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Operating System (OS)
A critical region is

none is the above
one which is enclosed by a pair of P and V operations on semaphores
a program segment where shared resources are accessed
a program segment that has not been proved bug-free
a program segment that often causes unexpected system crashes

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Operating System (OS)
What is the meaning of "Hibernate" in Windows XP/Windows 7?

Restart the Computer in hibernate mode
Shutdown the Computer without closing the running applications
Restart the Computer in safe mode
Shutdown the Computer terminating all the running applications

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Operating System (OS)
The disadvantages of "Compile and Go" loading scheme is (are):

a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
None of these
All of these
it is necessary to retranslate the user's program deck every time it is run.
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.

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