Operating System (OS)
The main function of the dispatcher (the portion of the process scheduler) is

None of these
swapping a process to the disk
suspending some of the processes when the CPU load is high
assigning ready process to the CPU
bring processes from the disk to the main memory

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Operating System (OS)
Addressing structure

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

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