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

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

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Operating System (OS)
Trojan-Horse programs

None of these
do not usually work
are legitimate programs that allow unauthorized access
usually are immediately discovered
are hidden programs that do not show up on the system

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