Operating System (OS)
Backups should be done

as several incrementals, followed by an image copy
daily for most installations
None of these
as several image copies, followed by an incremental
weekly for most installations

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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
users can create system programs and run them as commands
the command set being common across different hardware configurations
None of these
the processing is much faster than would other-wise be the case when user defined commands are used

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Operating System (OS)
Virtual Memory

allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
consists of those addresses that may be generated by a processor during execution of a computation.
None of these
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.

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