Input and Output Devices – Notes
🔹 What are Input Devices?
Devices that send data to the computer for processing.
✅ Examples:
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Keyboard – for typing text.
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Mouse – for selecting and clicking.
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Scanner – converts hardcopy to digital format.
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Microphone – records audio.
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Webcam – captures video/images.
🔹 What are Output Devices?
Devices that receive data from the computer and display or output it.
✅ Examples:
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Monitor – displays text, images, videos.
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Printer – prints documents/photos.
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Speakers – produce sound/audio.
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Projector – displays screen on larger surface.
🔁 Combined Input/Output Devices:
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Touchscreen – input via touch + display output.
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Modem – sends and receives data.
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Headset – microphone + headphone.
📌 Important Points:
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Keyboard is the most common input device.
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Monitor and printer are primary output devices.
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Touchscreen is a hybrid I/O device.
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Input → Processing → Output is the basic data flow in a computer.
📝 Example:
Typing a document using a keyboard (input) and seeing it on a monitor (output).
✅ MCQ Questions:
1. Which of the following is an input device?
A. Monitor
B. Printer
C. Keyboard
D. Speaker
✔️ Answer: C. Keyboard
2. Which device is used to display output visually?
A. Mouse
B. Monitor
C. Microphone
D. Joystick
✔️ Answer: B. Monitor
3. Which device is both input and output?
A. Mouse
B. Modem
C. Printer
D. Scanner
✔️ Answer: B. Modem
4. A scanner is used to:
A. Display data
B. Print data
C. Convert hardcopy to digital
D. Play sound
✔️ Answer: C. Convert hardcopy to digital
5. The primary function of an output device is to:
A. Process data
B. Store data
C. Send data to the computer
D. Display or present data
✔️ Answer: D. Display or present data