Operating System (OS)
All of the following are task performed by the operating system except

Performing housekeeping task like file compression and disk defragmentation
Controlling the access that application program has to the CPU
Provides an interface for user to interact with computer
Managing hardware on the computer

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

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

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