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

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

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Operating System (OS)
The function(s) of file system is (are):

to provide for long and short term storage of files with appropriate economic tradeoffs.
to provide complete file naming freedom to the users and to permit controlled sharing of files
to provide security against loss of information due to system failure
All of these
None of these

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