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Prelims 2026 · Q86 · Computing, AI & blockchain · provisional key (final not out yet)

Which of the following statements regarding the features of blockchain technology are correct ?

  1. 1.Records stored in the database may be made visible to relevant stakeholders without risk of alteration.
  2. 2.Copies of the entire database are stored on multiple computers on a network, syncing within seconds.
  3. 3.Consortium blockchain is a blend of public and private blockchains allowing selective data access.
  4. 4.Mathematical algorithms make it impossible to change or delete any data once recorded and accepted.

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Answer: C. 1, 2 and 4

Answer from the provisional UPSC key; it may change when the final key is out. A full explanation for this question is on its way.