O-LevelComputer ScienceHardware2210/12 · May/June 2018 · Q95 Marks
An advertisement in a magazine displays this barcode: [Figure 9.1]
- (a)Identify this type of barcode.[1]
- (b)Explain how the data stored in this barcode is read.[4]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- [1] (a) QR/Quick response
- [1] (b) Read/scanned using app (on mobile device)
- [1] (b) It is the camera that is used to scan/capture the image
- [1] (b) The three large squares are used to define the alignment // uses alignment targets/modules
- [1] (b) Black squares reflect less light // white squares reflect more light
- [1] (b) The app/device processes the image
- [1] (b) Each small square/pixel is converted to a binary value
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