Disk Operating System (DOS) Question:
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While working with MS-DOS which command is used to combine file1 plus file2 into new file named file3?

a. Copy file3 file1+file2
b. Copy file1+file2 file3
c. Copy file1+file2+file3
d. Copy file2 file1+file3

Answer:

b. Copy file1+file2 file3

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

a. Ren *.doc *.txt
b. Ren *.txt *.doc
c. Ren file.doc file.txt
d. Ren a: *.doc *.txt		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:

a. Copy a. *.txt
b. Copy *.txt a:
c. Copy *.txt c:
d. Copy *.txt all.txt