Exam-style question
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Which device is most suitable for automatically identifying a product at a supermarket checkout when the product has a printed code?.
- A.Digital camera
- B.Laser printer
- C.Barcode reader
- D.RFID tag
Model answer
What a good answer should say
- Barcode reader
Explanation
Why this works
A barcode reader optically scans the pattern of lines or other markings in a printed barcode and converts it into data that can be processed by a computer.
Common mistake
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