The system of multiple sets of question papers was reintroduced after two years and the sets were not only reordered but some had up to 30% new questions. Some papers even had more than three sets. Question papers also came with QR codes to trace the origin of a leak and stop its spread. The board tracked exam centre superintendents carrying papers to the centres.
from The Times of India https://ift.tt/2UT0F7E
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