Disc Operating System (DOS)
Which command is used to copy all files from drive A with extension .TXT to the currently logged drive and directory?

COPY a: *.TXT
COPY *.TXT C:
COPY *.TXT ALL.TXT
COPY *.TXT A:

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

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

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