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

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
None of these
priority is programmable
it is relatively easy to add more devices to the chain

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Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

detects/corrects errors
multiplexes the inputs and updates the memory accordingly
None of these
inquires to see if a terminal has any transaction to send
decides correct alternative by analysing several ones

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