CBSE Class 4 Computers Parts of a Computer Assignment

Difficult Words
1. Research

2. Animated

3. Electronic

4. Processing

5. Software

6. Scanner

7. Peripherals

8. Pointing

9. Keyboard

10. Microphone

11. Applications

12. Touch Pad

13. Engineers

14. Designers

15. Architects

16. Dot Matrix

17. Inkjet

18. Arithmetic

19. Logical

20. Track ball

Define:
Bar Code Scanner: It is used to scan the printed bar codes present on the various products. It can be seen in shops, malls etc.
Internal memory: It is the built-in memory, designed to store data and instructions while we are working on a computer.
External memory: It stores information for a longer period and the data stored in it is not lost even when the computer is turned off.
Multimedia card: It is a storage medium for portable devices, like mobiles , digital cameras and music players. It is small in size, approximately the size of a postage stamp.

Answer the following questions:

Q1: What are input devices? Name any two.
Answer : The devices through which we enter data and instructions are called Input devices. The two input devices are keyboard and mouse.

Q2: What is printer? Name the types of printer.
Answer : Printer is an important part of a computer system. It prints the output onto paper. The most commonly used printers are: Dot Matrix printers, Inkjet printers and Laser printers.

Q3. What is the use of light pen?
Answer : A Light pen is a pen like pointing device. It is used to select objects on the display screen. It is quite similar to a mouse except that it allows you to point to the objects displayed on the screen or draw directly on it.

Q4: What is the use of CPU? Name its parts.
Answer : C.P.U. is known as the brain of a computer. It processes and stores the information, performs calculations and send the results to the output devices. It performs all the jobs which we want it to do. The CPU has mainly three parts:
(i) MU (Memory Unit) (ii) ALU (Arithmetic Logical Unit) (iii) Control Unit

Q5: Differentiate between hard copy and soft copy.
Answer : Hard copy: The output printed on paper is called hard copy.
Soft copy: The information that we see on a monitor is called soft copy