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.
a portion of memory is wasted because the core occupied by the assembler is unavailable to the object program.
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

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Operating System (OS)
Round-robin scheduling

gives each task the same chance at the processor
is quite complex to implement
None of these
allows processor-bound tasks more time in the processor
allows interactive tasks quicker access to the processor

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