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

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Operating System (OS)
Paging

is a method of allocating processor time.
allows multiple programs to reside in separate areas of core at the time.
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
consists of those addresses that may be generated by a processor during execution of a computation.
None of these

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