Disc Operating System (DOS)
Copy and Xcopy are same in the sense

Both can be used to copy file or group of files
Both are internal command of DOS
Both are external commands of DOS
None of the listed here

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

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