Operating System (OS)
Addressing structure

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.
None of these
All of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

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Operating System (OS)
Scheduling is

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

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