Disc Operating System (DOS)
To copy the file command.com from drive c: to drive a:

C:A: copy command.com
Copy c:\command.com a:
None of the listed here
Drive c: copy drive a:\command.com

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Disc Operating System (DOS)
Which of the following applies to external DOS commands?

External commands reside in RAM until called
External commands are stored on disk separately from COMMAND.COM
External commands can only be executed from a batch file.
External commands must always be used with the /e switch

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