Operating System (OS)
A critical region is

a program segment that has not been proved bug-free
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 often causes unexpected system crashes

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Operating System (OS)
A linker

is not needed with a good compiler
is not necessary with variable partitions
None of these
creates a load module
must be run after the loader

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