ITPEC IP April 2021 Question 76
ITPEC IP April 2021 — Question 76 of 100
A QR code can be read from any orientation. Its position-detection patterns allow a reader to determine alignment and decode the two-dimensional matrix from the top, bottom, left, or right, while error correction improves robustness.
Answer (c)
Why not others:
- QR codes can encode multiple data modes, not only single-byte alphanumeric characters
- their capacity is much greater than that of a conventional one-dimensional barcode
- a QR code is a matrix of modules, not three stacked barcode layers
Key rule: QR is a high-capacity two-dimensional matrix code designed for fast omnidirectional reading.
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