Operating System (OS)
The term "operating system" means

a set of programs which controls computer working
conversion of high level language into machine code
the way a computer operator works
None of these
the way a floppy disk drive operates

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

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

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