Which command will be used to display a column file compression ratio for each file of Double spaced disk?

The correct answer is D. DIR /C (/C switch introduced in DOS version 6.00).

The DIR command is used to list the files and folders in a directory. The /C switch displays the compression ratio for each file. This switch was introduced in DOS version 6.00.

The other options are incorrect.

• A. DIR/W displays the directory listing in wide format.
• B. DIR/S displays the directory listing for all subdirectories.
• C. DIR/B displays the directory listing in lowercase letters.
• E. None of the above is a valid command.