Operating System (OS)
The LRU algorithm

pages out the first page in a given area
None of these
pages out pages that have been used recently
pages out pages that have been least used recently
pages out pages that have not been used recently

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

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

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