Operating System (OS)
Multi programming systems ......

Execute each job faster
Execute more jobs in the same time period
Are easier to develop than single programming system
Are used only by large mainframe computer

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

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

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