Operating System (OS)
What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?

XENIX
None of these
UNIX
OS/2
MS DOS

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

swapping a process to the disk
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

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