Operating System (OS)
The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk, is known as

caching
None of these
virtual programming
spooling
multiprogramming

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Operating System (OS)
A public key encryption system

None of these
allows only the correct receiver to decode the data
does not encode the data before transmitting it
allows only the correct sender to decode the data
allows anyone to decode the transmission

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