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
inquires to see if a terminal has any transaction to send
decides correct alternative by analysing several ones
None of these

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

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

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Operating System (OS)
The advantage(s) inherent to using high level languages is (are)

All of these
Improved debugging capability, and superior documentation
A greater degree of machine independence
Fewer people, less management and shorter transition in learning time
None of these

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