Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

None of these
decides correct alternative by analysing several ones
detects/corrects errors
inquires to see if a terminal has any transaction to send
multiplexes the inputs and updates the memory accordingly

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Operating System (OS)
The disadvantages of "Compile and Go" loading scheme is (are):

a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
None of these
All of these
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.
it is necessary to retranslate the user's program deck every time it is run.

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