(A) Mechanical (X)
(B)  Electrical (X)
(C)  Laser ()
(D) Electro Magnetic (X)

Answers:  Laser

(A)  Graphical User Interface (X)
(B) Command Line Interface ()
(C) Multitasking (X)
(D) Menu Driven Interface (X)

Answers: Command Line Interface

(A) Operating system ()
(B) System software (X)
(C) Utility program (X)
(D) Device driver (X)

Answers: A collection of system programs that controls and co-ordinates the overall operations of a computer system is called Operating system.

(A) World Whole Web (X)
(B) Wide World Web (X)
(C) Web World Wide (X)
(D) World Wide Web ()

Answers: WWW stands for World Wide Web.

(A)  Scanner ()
(B) Keyboard (X)
(C)  OMR (X)
(D) None of these (X)

Answers: A light sensitive device that converts drawing, printed text or other images into digital form is Scanner.

(A) Uni-process (X)
(B) Multi-threaded (X)
(C) Multiprocessor ()
(D) Multi-programming (X)

Answers: If a computer has more than one processor then it is known as Multiprocessor.