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
detects/corrects errors
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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Operating System (OS)
The FIFO algorithm

executes first the job that first entered the queue
executes first the job with the least processor needs
None of these
execute first the job that has been in the queue the longest
executes first the job that last entered the queue

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