Operating System (OS)
The term "operating system" means

the way a computer operator works
a set of programs which controls computer working
conversion of high level language into machine code
None of these
the way a floppy disk drive operates

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

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

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