Operating System (OS)
Memory

is typically characterized by interactive processing and time-slicing of the CPU
is a sequence of instructions
None of these
is the device where information is stored
is a device that performs a sequence of operations specified by instructions in memory.

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

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