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.
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.
All of these

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Operating System (OS)
Assembler language

is usually the primary user interface
requires fixed-format commands
is a mnemonic form of machine language
None of these
is quite different from the SCL interpreter

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