1. The brain of any computer system is


B. Memory


D. Control unit

E. None of the above

2. _______ are software which is used to do particular task.

A. Operating system

B. Program

C. Data

D. Software

3.    While working with Ms-Dos which command transfers a specific file from one disk to another?

a.    Copy

b.    Diskcopy

c.    Time

d.    Rename

4.    Which command creates a directory or subdirectory?

a.    Dir

b.    Mkdir

c.    Md

d.    Both b and c

5. Which command is used to delete the directory that is empty?

a.    Del *.*

b.    RD

c.    Erase

d.    MD