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4. __________ controls the working of all the parts of a
computer. 4. a b c d

a. Control Unit b. Memory unit 5. a b c d

c. ALU d. None of these
5. _________ converts the incoming electricity into proper voltage and

supplies it to another parts present inside the CPU box.
a. SMPS b. Motherboard

c. Memory Chips d. Ports

B. Gap-fill exercise.

1. ________ is the main board.
2. ________ are used to listen to music, voice and sound on a computer.

3. A ________ looks like a CD but can store more data than it.

4. ________ are used to plug various devices such as the mouse, keyboard or
printer to the computer system.
5. The CPU stores all the data and instructions that need to be processed in the

__________.

C. True and False assessment.

1. CPU is responsible for processing the data given by the user.
2. There are three types of memory chips present on the motherboard.

3. A monitor displays the result or output as a hard copy.
4. CD stands for Compact Disc.

5. Pen Drive is a storage device which is very small in size.

D. Complete the chart given below.

Computer System

Software

E. Give appropriate responses to the questions.

1. Define computer hardware.
2. What do you mean by input devices?

3. What do you mean by output devices?

4. Define storage devices.
5. What do you mean by processing device?

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