Operating System (OS)
Operating system

None of these
provides a layered, user-friendly interface
enables the programmer to draw a flowchart
All of these
links a program with the subroutines it references

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

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

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