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

it is necessary to retranslate the user's program deck every time it is run.
None 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.
a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
All of these

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