Operating System (OS)
The dispatcher

puts tasks in I/O wait
actually schedules the tasks into the processor
is always small and simple
None of these
never changes task priorities

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

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

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Operating System (OS)
Addressing structure

None of these
All of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
defines the fundamental method of determining effective operand addresses

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