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

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

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Operating System (OS)
The LRU algorithm

pages out pages that have been used recently
None of these
pages out the first page in a given area
pages out pages that have not been used recently
pages out pages that have been least used recently

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