Which of the following program is essential for the functioning of a computer system?
A. MS Word B. Operating system C. MS Excel D. System software
Which of the following operating systems makes use of CLI?
A. MS-DOS B. Windows 2000 C. Windows Server 2003 D None of the above
Which of the following operating systems makes use of GUI?
A. Windows 2000 B. Windows Server 2003 C. Windows Vista D. All of the above