Q86.
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. 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 :
Answer
C
Explanation
Blockchain is a distributed ledger in which copies are maintained across network nodes and cryptographic mechanisms make accepted records highly resistant to alteration. In the exam's formulation, statements 1, 2 and 4 are treated as correct; statement 3 is incorrect because a consortium blockchain is governed by a group of known organisations and is not simply synonymous with a public-private 'hybrid' blockchain. Hence C.