Operating System (OS)
The details of all external symbols and relocation formation (relocation list or map) is provided to linker by

None of these
Editor
Loader
Macro processor
Translator

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Operating System (OS)
A critical region is

a program segment that often causes unexpected system crashes
a program segment that has not been proved bug-free
none is the above
one which is enclosed by a pair of P and V operations on semaphores
a program segment where shared resources are accessed

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