Operating System (OS)
Swapping

works best with many small partitions
allows each program in turn to use the memory
None of these
does not work with overlaying
allows many programs to use memory simultaneously

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

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

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