Operating System (OS)
A critical region is

a program segment that has not been proved bug-free
a program segment where shared resources are accessed
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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Operating System (OS)
Which of the following statement is true.

The LRU algorithm pages out pages that have been used recently
Seek analysis is used for analysing control-unit busy problems.
Thrashing is a natural consequence of virtual memory systems.
All of these
None of these

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