Operating System (OS)
The advantage of a command processor running only built-in commands is:

None of these
the processing is much faster than would other-wise be the case when user defined commands are used
the command set being common across different hardware configurations
flexibility to the users in running lists of commands by simply collecting them in named batch command files
users can create system programs and run them as commands

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Operating System (OS)
System generation:

is always quite simple
is always very difficult
requires extensive tools to be understandable
varies in difficulty between systems
None of these

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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
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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