Operating System (OS)
User-Friendly Systems are:

becoming more common
None of these
required for object-oriented programming
easy to develop
common among traditional mainframe operating systems

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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
swapping a process to the disk
assigning ready process to the CPU
suspending some of the processes when the CPU load is high

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