Disk Operating System (DOS) Interview Question:

Only filenames and extensions are to be displayed in wide format, which command you'll use?

a. Dir/w
b. Dir a:
c. Dir/s
d. Dir/b

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a. Dir/w
Explanation:
Dir/w only displays the file names and extensions excluding file created date/time, file size. Second option dir a: will list the contents of A drive (floppy drive), third dir/s lists current directory and its subdirectories too, dir/b displays bare format, that means, it just makes a list of files, no more information.
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