Computer Science for IGCSE & O level - Hardware (Section 7 - No. 1)
What is the purpose of the three large squares on the corners of a QR code?
To indicate the QR code's size.
To correct errors in the code.
To assist the camera to correctly read the QR code.
To store extra data.
Explication
The large squares in the corner are used to assist the camera in reading the code correctly.