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
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
None of these
users can create system programs and run them as commands

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Operating System (OS)
Object code

is the output of compilers, but not assemblers
must be "loaded" before execution
is ready to execute
must be rewritten before execution
None of these

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