O-LevelComputer ScienceData Representation2210/12 · May/June 2017 · Q64 Marks

Airline boarding passes can be read from a smartphone instead of a printout. [Figure A: Smartphone displaying a boarding pass with a QR code labeled 'A'] Identify what type of barcode A is an example of. Explain how the data stored in this type of barcode is read.

(a)Identify what type of barcode A is an example of. Explain how the data stored in this type of 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 2017). The mark or mark type is shown in brackets.

1 mark for correct name of code, up to a further 3 marks for appropriate explanation ∞ Quick response (QR) Code
Three from: ∞ Barcode is captured / scanned / imaged, by a camera / scanner / barcode reader / QR code reader ∞ Read using a laser ∞ Processed by an app ∞ Light is reflected back ∞ Black squares reflect less light than white squares ∞ Modules are used for orientation / alignment ∞ Squares / data are decoded

On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.

Topic: Data Representation, O-Level Computer Science (syllabus 2210). Structured question, 4 marks.
Source: O-Level Computer Science, May/June 2017 Paper 1 Variant 2, question 6.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content