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

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
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

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Operating System (OS)
A relocate program form is one which

can itself performs the relocation of its address-sensitive portions.
All of these
cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation.
None of these
consists of a program and relevant information for its relocation.

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