Operating System (OS)
Backups should be done

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

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Operating System (OS)
The disadvantages of "Compile and Go" loading scheme is (are):

All of these
it is very difficult to handle multiple segments, especially if the source programs are in different languages, and to produce orderly modular programs.
None of these
a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
it is necessary to retranslate the user's program deck every time it is run.

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