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.
All of these
Thrashing is a natural consequence of virtual memory systems.
None of these

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Operating System (OS)
The necessary conditions needed before deadlock can occur?

Mutual Exclusion, Hold and wait, Preemption, No Circular Wait
Mutual Exclusion, Hold and wait, No Preemption, Circular Wait
Mutual Exclusion, No Hold and wait, Preemption, Circular Wait
No Mutual Exclusion, Hold and wait, Preemption, Circular Wait

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