<aside> 💡 3.2.1 Understand what is meant by an input device and why it is required Including: – barcode scanner – digital camera – keyboard – microphone – optical mouse – QR code scanner – touch screen (resistive, capacitive and infra-red) – two-dimensional (2D) and three-dimensional (3D) scanners

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• Define what is meant by the term "Input devices"

TYPICAL EXAM QUESTIONS

Barcode scanners

• Define what is meant by the term "Barcode"
• Describe how the barcode scanner reads the barcode. [4 Marks]
• Explain how the barcode system could help the [Insert scenario]. [3 marks]

Digital Camera

• Explain how the captured image are converted to digital photo files [4 marks]

Keyboard

• Disadvantages of using a keyboard
• Why using other methods of inputting is better

Microphone

• Describe how does a microphone work. [4 marks]