Operating System (OS)
Under virtual storage,

a single program is processed by two or more CPUs
interprogram interference may occur
None of these
two or more programs are stored concurrently in primary storage
only the active pages of a program are stored in primary storage

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

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
the processing is much faster than would other-wise be the case when user defined commands are used
None of these
the command set being common across different hardware configurations

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