Operating System (OS)
Scheduling is

not required in uniprocessor systems
allowing jobs to use the processor
None of these
the same regard-less of the purpose of the system
unrelated to performance consideration

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

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

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