Operating System (OS)
Thrashing

always occurs on large computers
can be caused by poor paging algorithms
None of these
is a natural consequence of virtual memory systems
can always be avoided by swapping

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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
None of these
the command set being common across different hardware configurations
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

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