Operating System (OS)
Which of the following functions is(are) performed by the loader

physically place the machine instructions and data into memory.
None of these
allocate space in memory for the programs and resolve symbolic references between object decks
All of these
adjust all address dependent locations, such as address constants, to correspond to the allocated space.

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Operating System (OS)
A critical region is

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

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