Which of the following statements regarding the features of blockchain technology are correct? 1. Records stored in the database may be made visible to relevant stakeholders without risk of alteration. 2. Copies of the entire database are stored on multiple computers on a network, syncing within seconds. 3. Consortium blockchain is a blend of public and private blockchains allowing selective data access. 4. Mathematical algorithms make it impossible to change or delete any data once recorded and accepted. Select the answer using the code given below:

Which of the following statements regarding the features of - MCQ (English)

UPSC CSE PRELIMS2026General Studies

Blockchain Technology

Hard

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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:

Correct Answer: A — 1 and 3

Explanation:

Statement 1 is accepted as a valid blockchain feature. Statement 2 is rejected because synchronization "within seconds" is too absolute for distributed blockchain systems. Statement 3 is accepted because consortium blockchains are allowing selective access across a grouped control structure. Statement 4 is rejected because "impossible" is considered too strong; data alteration is computationally difficult, not logically impossible.