Operating System (OS)
All of the following are TRUE regarding virtual memory EXCEPT

Any amount of RAM can be allocated to virtual memory
This temporary storage is called the swap file or page file
The setting for the amount of hard disk drive space to allocate virtual memory can be manually change
Virtual memory is the physical space o the hard drive

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Operating System (OS)
A critical region is

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

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