Disk Operating System (DOS) Question:
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Which command is used to delete the directory that is empty?

a. Del *.*
b. RD
c. Erase
d. MD

Answer:

b. RD
Explanation:
RD command or RMDIR commands can be used to remove a directory if it is empty. Del command and Erase commands are used to delete files not directories. MD creates a new directory and can't remove directory.

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Which command is used to display all the files having the (.exe) extension but different filename?

a. Dir filename.*
b. Dir filename.ext
c. Dir *.sys
d. Dir *.ext		Which command creates a directory or subdirectory?

a. Dir
b. Mkdir
c. Md
d. Both b and c