GK Question

science medium mcq

Which feature of blockchain ensures that records cannot be altered retroactively?

  1. Decentralization
  2. Immutability
  3. Transparency
  4. Anonymity

Answer: Immutability

Immutability: once data is added to a block and chained via hashes, altering it requires recalculating all subsequent blocks across the network—computationally infeasible. Core to trustless systems. [[NITI Aayog Reports]]

Topic Technology - Blockchain Applications
Exam Relevance UPSC CSE, Banking Specialist Officer, SSC CHSL