Operating System (OS)
A page fault occurs when

the page is found in the memory
the Deadlock happens
the Segmentation starts
the page is not found in the memory

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Operating System (OS)
Trojan-Horse programs

usually are immediately discovered
do not usually work
are hidden programs that do not show up on the system
are legitimate programs that allow unauthorized access
None of these

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