Lesson 4

Question 1

It is like that of a traditional typewriter, although there are some additional keys provided for performing additional functions.

Answer 1

Keyboard

Question 2

It is a very famous cursor-control device having a small palm size box with a round ball at its base, which senses the movement of the mouse and sends corresponding signals to the CPU when the mouse buttons are pressed.

Answer 2

Mouse

Question 3

It is also a pointing device, which is used to move the cursor position on a monitor screen. It is a stick having a spherical ball at its both lower and upper ends.

Answer 3

Joystick

Question 4

It is a pointing device similar to a pen. It is used to select a displayed menu item or draw pictures on the monitor screen. It consists of a photocell and an optical system placed in a small tube.

Answer 4

Light pen

Question 5

It is an input device that is mostly used in notebook or laptop computer, instead of a mouse. This is a ball which is half inserted and by moving fingers on the ball, the pointer can be moved.

Answer 5

Track ball

Question 6

It is an input device, which works more like a photocopy machine. It is used when some information is available on paper and it is to be transferred to the hard disk of the computer for further manipulation.

Answer 6

Scanner

Question 7

It is an input device which converts analog information into digital form. It can convert a signal from the television or camera into a series of numbers that could be stored in a computer.

Answer 7

Digitizer

Question 8

It is an input device to input sound that is then stored in a digital form.

Answer 8

Microphone

Question 9

An input device is generally used in banks as there are a large number of cheques to be processed every day.

Answer 9

Magnetic Ink Card Reader

Question 10

It is an input device used to read a printed text.

Answer 10

Optical Character Reader

Question 11

It is a device used for reading bar coded data (data in the form of light and dark lines).

Answer 11

Bar Code Reader

Question 12

It is a special type of optical scanner used to recognize the type of mark made by pen or pencil. It is used where one out of a few alternatives is to be selected and marked.

Answer 12

Optical Mark Reader

Question 13

It is also called the computer’s brain because it carries out a computer program’s instructions, as well as all computer functions.

Answer 13

Central Processing Unit (CPU)

Question 14

It allocates power and facilitates connectivity to and from the CPU, RAM, and all other hardware components of the computer.

Answer 14

Motherboard

Question 15

It ensures all the circuits within the computer operate simultaneously.

Answer 15

Clock

Question 16

It is the name of a group of integrated circuits that work together and manage and operate the entire computer system.

Answer 16

Chipset

Question 17

It is found on a motherboard, and it is a collection of wires used by the CPU to transfer data in a computer between components.

Answer 17

Data bus

Question 18

It is used to insert an expansion card, also called a circuit board that provides additional features like video, sound, or memory, etc. to a computer.

Answer 18

Expansion slots

Question 19

It is a device that is installed in your computer to link the user to the network.

Answer 19

Network cards

Question 20

It is a temporary unit that stores data in the computer system. It retains the data for a brief period of time, and only temporarily when the data is processed.

Answer 20

Random Access Memory