Operating System (OS)
Addressing modes

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

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Operating System (OS)
Round-robin scheduling

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

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