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

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

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Operating System (OS)
Page stealing

Should be the turning goal
Is taking page frame from other working sets
Is taking layer disk space for page in page out
Is a sign of an efficient system

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