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

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

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Operating System (OS)
A critical region is

one which is enclosed by a pair of P and V operations on semaphores
a program segment that has not been proved bug-free
none is the above
a program segment that often causes unexpected system crashes
a program segment where shared resources are accessed

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