Operating System (OS)
Scheduling is

unrelated to performance consideration
the same regard-less of the purpose of the system
allowing jobs to use the processor
not required in uniprocessor systems
None of these

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Operating System (OS)
Addressing modes

performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
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.
None of these

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