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

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
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
None of these

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Operating System (OS)
Page stealing

Is a sign of an efficient system
Is taking layer disk space for page in page out
Should be the turning goal
Is taking page frame from other working sets

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