Operating System (OS)
The primary purpose of an operating system is:

To keep systems programmers employed
To allow people to use the computer
To make computers easier to use
To make the most efficient use of the computer hardware

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

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

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Operating System (OS)
System maintenance:

always requires several programs
is necessary on all systems, regardless of how good
is not required if the system is well written
None of these
is usually not necessary

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