Discussion
Which of the following applies to external DOS commands?
Answer: B
Correct answer: External commands are stored on disk separately from COMMAND.COM
External commands are separate program files - FORMAT.COM, XCOPY.EXE and the rest - which DOS must find on disk and load before running. Internal commands are built into COMMAND.COM and are therefore always available; the external ones are unavailable if the file is missing or not on the path.
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