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

None of these
flexibility to the users in running lists of commands by simply collecting them in named batch command files
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

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Operating System (OS)
A page fault

is a reference to a page belonging to another program
None of these
is an access to a page not currently in memory
is an error is a specific page
occurs when a program accesses a page of memory

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