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.
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
None of these

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Operating System (OS)
Which of the following statement is true.

Thrashing is a natural consequence of virtual memory systems.
All of these
The LRU algorithm pages out pages that have been used recently
Seek analysis is used for analysing control-unit busy problems.
None of these

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