ITPEC IP October 2021 Question 73
ITPEC IP October 2021 — Question 73 of 100
A QR code stores substantial information in a compact two-dimensional symbol and includes error correction. Its redundant encoding allows a reader to recover data even when part of the symbol is dirty, damaged, or obscured, within the selected correction level.
Answer (c)
Why not others:
- an ISBN identifies a publication and is not itself the described two-dimensional coding scheme
- ITF is a one-dimensional interleaved barcode
- Unicode maps characters to code points and is not an optical symbol with image-level error correction
Key rule: QR codes combine two-dimensional data capacity with error correction for robust optical scanning.
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