Operating System (OS)
Which of the following statement is true.

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

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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
a program segment that often causes unexpected system crashes
none is the above

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