Important Extra Questions and Answers for ICT Chapter 3: Input Devices

1. What are input devices?
Input devices are hardware devices that allow users to provide data or instructions to a computer. These devices enable users to input information or interact with the computer system.

2. What are the different types of input devices?
There are several types of input devices, including:
a. Keyboard: It is a common input device that allows users to input text and commands.
b. Mouse: A pointing device used to move the cursor on the screen and interact with graphical user interfaces.
c. Scanner: It allows users to convert physical images or documents into digital format.
d. Microphone: It captures audio input and allows users to record sounds or provide voice commands.
e. Joystick: Used for gaming or controlling movements in certain applications.
f. Webcam: A video input device that captures live video and transmits it to the computer.
g. Touchpad: Found on laptops, it acts as a mouse-like device by detecting finger movements.
h. Digital Camera: Used to capture and transfer digital photographs or videos to a computer.
i. Graphics Tablet: A device used by artists to draw or sketch directly onto a computer using a stylus.

3. Explain the working principle of a keyboard.
A keyboard consists of multiple keys arranged in a specific layout. When a key is pressed, it completes an electrical circuit and sends a signal to the computer. The computer then interprets the signal and displays the corresponding character or executes the assigned function.

4. What are the advantages of using a scanner?
Scanners offer several advantages, including:
a. Easy digitization: Scanners convert physical documents or images into digital format, making it easier to store, share, or edit them.
b. Preservation: Scanned documents can be preserved digitally, reducing the risk of physical damage or loss.
c. OCR capabilities: Optical Character Recognition (OCR) technology in scanners allows the conversion of printed text into editable and searchable digital text.
d. Improved efficiency: Scanning eliminates the need for manual data entry, saving time and reducing errors.

5. What is the purpose of a microphone as an input device?
Microphones are used to capture audio input and convert it into a digital format. They allow users to record sounds, provide voice commands, engage in voice chats, and create audio recordings for various purposes.

Important Extra Questions and Answers for ICT Chapter 4: Output Devices

1. What are output devices?
Output devices are hardware devices that display or present processed data or information to the user. These devices take the output from the computer system and present it in a usable form.

2. What are the different types of output devices?
There are various types of output devices, including:
a. Monitor: It displays visual output in the form of text, images, videos, etc.
b. Printer: Used to produce hard copies of documents, images, or other digital content.
c. Speaker: Produces audio output, allowing users to listen to sounds, music, or multimedia content.
d. Projector: Displays visual output on a larger screen or surface, commonly used in presentations or home theaters.
e. Headphones: Used for personal audio output, allowing users to listen to sounds without disturbing others.
f. Plotter: It is used to produce high-quality and precise graphical output, commonly used in architectural or