Multiple choice

Which of the following is not an external DOS command?

  1. Chkdsk

  2. Copy

  3. xcopy

  4. None of the above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Copy is an internal DOS command built into COMMAND.COM, while Chkdsk and xcopy are external commands stored as separate .EXE or .COM files on disk. Internal commands execute immediately without loading additional programs.