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

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Operating System (OS)
System generation:

None of these
is always very difficult
is always quite simple
varies in difficulty between systems
requires extensive tools to be understandable

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