Prelims 2026 · Science and Technology · Question 86
Which of the following statements regarding the features of blockchain technology are correct?
- Records stored in the database may be made visible to relevant stakeholders without risk of alteration.
- Copies of the entire database are stored on multiple computers on a network, syncing within seconds.
- Consortium blockchain is a blend of public and private blockchains allowing selective data access.
- Mathematical algorithms make it impossible to change or delete any data once recorded and accepted.
Select the answer using the code given below:
Answer
1 and 3
Statement 1 is correct: blockchain records can be shared with authorized stakeholders while the ledger remains tamper-evident. Statement 2 is too absolute because not every node stores the entire database and synchronization time varies. Statement 3 is acceptable for a consortium or permissioned network governed by several organizations with selective access. Statement 4 is also too absolute: blockchains are tamper-resistant, not literally impossible to alter under every consensus or governance arrangement. Hence, 1 and 3 are correct.