Operating System (OS)
Round-robin scheduling

allows processor-bound tasks more time in the processor
None of these
allows interactive tasks quicker access to the processor
is quite complex to implement
gives each task the same chance at the processor

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Operating System (OS)
Addressing modes

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

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