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ICT Class 4 - Input And-Output-Devices Notes

Comprehensive study notes for Class 4 - Input And-Output-Devices olympiad preparation

Input and Output Devices

Welcome to the chapter on Input and Output Devices for Class 4. In this chapter, you will learn about the devices that help us give instructions to the computer (input devices) and the devices that show us the results (output devices). By the end of this chapter, you will be able to name and use different input and output devices!

Introduction

Computers need our help to work. We use input devices to give instructions and output devices to see the results. Let’s learn about these important parts of a computer!

Input Devices

Input devices are used to enter data and instructions into the computer.

  • Keyboard: Used to type letters, numbers, and symbols.
  • Mouse: Used to point, click, and select items on the screen.
  • Microphone: Used to record sound or give voice commands.
  • Scanner: Used to copy pictures or documents into the computer.
  • Webcam: Used to take photos or make video calls.

Output Devices

Output devices show us the results after the computer processes our instructions.

  • Monitor: Shows text, pictures, and videos on the screen.
  • Printer: Prints text and pictures on paper.
  • Speakers: Play sounds and music.
  • Projector: Shows computer screen on a big wall or screen.

Fun Activity: Find and Name!

Look around your computer lab or home. Can you find a keyboard, mouse, monitor, and speakers? Write their names and draw their pictures.

Summary

  • Input devices help us give instructions to the computer.
  • Output devices show us the results from the computer.
  • We use both input and output devices to work with computers.

Practice Questions

  1. Name two input devices.
  2. What does a printer do?
  3. Which device is used to type letters?
  4. What do speakers do?
  5. Name one output device that shows pictures and videos.

Challenge Yourself

  • Draw and label any three input devices and three output devices.
  • List one device that can be used as both input and output (hint: touchscreen).

Did You Know?

  • Touchscreens can be used to give instructions (input) and show results (output)!
  • Some printers can also scan and copy documents.

Glossary

  • Input Device: A device used to enter data into the computer.
  • Output Device: A device used to show results from the computer.
  • Monitor: A screen that shows what is happening in the computer.
  • Printer: A machine that prints on paper.

Answers to Practice Questions

  1. Keyboard, mouse (any two input devices).
  2. A printer prints text and pictures on paper.
  3. Keyboard.
  4. Speakers play sounds and music.
  5. Monitor.

Computers need input and output devices to work. Learn their names and use them well!

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