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UPSC 2020: With reference to "Blockchain Technology", consider the following statements : 1. It is a public ledger that everyone can inspect, but which no single user controls. 2. The structure and design of blockchain is such that all the data in it are about cryptocurrency only. 3. Applications that depend on basic features of blockchain can be developed without anybody's permission. Which of the statements given above is/are correct ?
(a)1 only
(b)1 and 2 only
(c)2 only
(d)1 and 3 only
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Not attemptedCorrect Answer: (d) 1 and 3 only
Statement 1 is correct because a blockchain is a distributed public ledger that can be read by anyone but is not controlled by a single entity. Statement 2 is wrong—the ledger can store any kind of data (land records, supply-chain entries, identity tokens, etc.), not only cryptocurrency data. Statement 3 is correct; public, permissionless blockchains (e.g., Bitcoin, Ethereum) allow anyone to create applications or smart contracts without seeking approval. Hence only 1 and 3 are correct, making option (d) the right choice. ([sprintupsc.com](https://sprintupsc.com/PreviousYearsWeb/upsc-prelims-2020-answer-key.html?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2020 Science & Technology question?▼
The correct answer is option (d): 1 and 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Computer & Information Technology question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2020, GS Paper 1, as Question 40. It falls under Science & Technology > Computer & Information Technology.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Computer & Information Technology?▼
UPSC has asked 50 questions from Computer & Information Technology (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.