Operating System (OS)
A public key encryption system

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

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Operating System (OS)
Assembler language

None of these
is a mnemonic form of machine language
is quite different from the SCL interpreter
requires fixed-format commands
is usually the primary user interface

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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
decides correct alternative by analysing several ones
inquires to see if a terminal has any transaction to send
multiplexes the inputs and updates the memory accordingly

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