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
detects/corrects errors
inquires to see if a terminal has any transaction to send
None of these

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Operating System (OS)
Virtual Memory

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.
None of these
consists of those addresses that may be generated by a processor during execution of a computation.

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Operating System (OS)
Link encryption

is less secure than end-to-end encryption
None of these
is used only to debug
is more secure than end-to-end encryption
can not be used in a public network

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