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

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

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Operating System (OS)
Scheduling is

allowing jobs to use the processor
None of these
the same regard-less of the purpose of the system
unrelated to performance consideration
not required in uniprocessor systems

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Operating System (OS)
A co-processor

Is relatively easy to support in software
Causes all processor to function equally
Is quite common in modern computer
Works with any application

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