Disc Operating System (DOS)
While working with MS-DOS, which command is used to combine FILE1 plus FILE2 into new file named FILE3?

COPY FILE2 FILE1+FILE3
COPY FILE3 FILE1+FILE2
COPY FILE1+FILE2 FILE3
COPY FILE1+FILE2+FILE3

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

Internal commands can be run whenever the DOS prompt is displayed
Internal commands are reserved for DOS-level programming
Internal commands are stored on disk separately from COMMAND.COM
Internal commands can only be executed from a batch file

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