Operating System (OS)
In MS-DOS, relocatable object files and load modules have extensions

None of these
.EXE and .OBJ, respectively
.OBJ and .COM or .EXE, respectively
.DAS and .EXE, respectively
.COM and .OBJ, respectively

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Operating System (OS)
Capacity planning

is independent of the operating system
does not depend on the monitoring tools available
requires detailed system performance information
None of these
is not needed in small installations

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