Operating System (OS)
Operating system

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

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Operating System (OS)
Which of the following is not a characteristic of a daisy chaining priority control scheme?

None of these
priority is programmable
the number of control lines is independent of the number of devices on the chain
the failure of one device may affect other devices on the chain
it is relatively easy to add more devices to the chain

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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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