93.
While working with MS-DOS which command is used to change the extension of all filenames ending with .txt to .doc?

94.
While working with MS-DOS which command is used to combine file1 plus file2 into new file named file3?

97.
While working with MS-DOS, which command is used to rename a file named file1.doc to file2.doc from a different directory called dir1?

98.
While working with which command is used to copy all files from the currently logged drive and directory with the extension .txt to the drive a

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