Operating System (OS)
Memory

None of these
is typically characterized by interactive processing and time-slicing of the CPU
is the device where information is stored
is a sequence of instructions
is a device that performs a sequence of operations specified by instructions in memory.

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Operating System (OS)
A critical region is

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

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