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Q51 (IAS/2026) Science & Technology › ICT, AI, Cybersecurity & Emerging Tech Official Key

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:

Result
Your answer: —  ·  Correct: C

Explanation

Blockchain technology has several core features, as highlighted in NITI Aayog's strategy paper on blockchain:

  • Adjustably Transparent: Records stored in the database may be made visible to relevant stakeholders without risk of alteration. (Statement 1 is correct)
  • Distributed: Copies of the entire database are stored on multiple computers on a peer-to-peer network, syncing within seconds or minutes. (Statement 2 is correct)
  • Immutable: Cryptographic and mathematical algorithms make it impossible to change or delete any data once it is recorded and accepted by the network. (Statement 4 is correct)

Statement 3 is factually true but contextually incorrect: A consortium blockchain is indeed a hybrid of public and private blockchains. However, it is a type of blockchain architecture, not a general feature of blockchain technology itself. Furthermore, the given options do not include a choice where all four statements are correct, making 1, 2, and 4 the most accurate selection for the features of the technology.

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PROVENANCE & STUDY PATTERN

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Don’t just practise – reverse-engineer the question. This panel shows where this PYQ came from (books / web), how the examiner broke it into hidden statements, and which nearby micro-concepts you were supposed to learn from it. Treat it like an autopsy of the question: what might have triggered it, which exact lines in the book matter, and what linked ideas you should carry forward to future questions.
Which of the following statements regarding the features of blockchain technology are correct? 1. Records stored in the database may be made…
At a glance
Origin: Books + Current Affairs Fairness: Moderate fairness Books / CA: 5/10 · 5/10
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This is a classic UPSC tech question blending static concepts (DLT, immutability) with current affairs nuances. While basic economy books cover statements 1 and 4, statements 2 and 3 are deliberate traps testing your depth of understanding regarding network realities and specific definitions (Consortium vs. Hybrid).

How this question is built

This question can be broken into the following sub-statements. Tap a statement sentence to jump into its detailed analysis.

Statement 1
Are blockchain database records visible to stakeholders while remaining immutable to alteration?
Origin: Direct from books Fairness: Straightforward Book-answerable
From standard books
Indian Economy, Vivek Singh (7th ed. 2023-24) > Chapter 12: Supply Chain and Food Processing Industry > Use of Blockchain technology in Warehouse Receipt Finance > p. 373
Presence: 4/5
“"Whrrl" is a start-up which provides "blockchain platform" for warehouse receipt financing and it has now on boarded Maharashtra State Coop bank as a lender on this platform. Earlier, the loan process for farmers used to take 7-15 days with a lot of documentation and verifications but now "Whrrl" allows the transfer of the loan amount to farmers in just five minutes in a secure and transparent way. Whrrl's solution combines blockchain along with IoT and Smart Contracts to make it easier for farmers to get loans against any commodity lying in the warehouse without any guarantors. For the banks, it becomes a risk-free lending process and brings transparency into the system.”
Why this source?
  • Blockchain platforms facilitate secure and transparent transfers of loan amounts and documentation.
  • The technology brings transparency into systems like warehouse receipt financing, allowing stakeholders to track transactions.
Indian Economy, Vivek Singh (7th ed. 2023-24) > Chapter 2: Money and Banking- Part I > Advantages of CBDC > p. 79
Presence: 3/5
“For example, if a commercial bank collapses, then our savings could potentially be wiped out, but this would not be the case with CBDCs, which we can hold on to our own in digital form and could be as trusted as cash.• CBDCs would be as convenient as payment apps and it also benefits from the same blockchain technology (Distributed Ledger Technology) which supports crypto currency.• Payments would be faster and easier without any delay as there is no settlement issue• Legal tender-based payment which will be efficient, trusted and regulated.• Higher seigniorage due to lower cost of printing, transportation/distribution and storing paper currency.• Introduction of CBDC would lead to a more robust, efficient, trusted, regulated and legal tender-based payments option.• E-rupee would offer features of physical cash like trust, safety and settlement facility”
Why this source?
  • Blockchain is a form of Distributed Ledger Technology, which provides a trusted and secure framework for digital assets.
  • The technology ensures safety and trust in digital payments, which are essential for maintaining reliable records.
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SIMILAR QUESTIONS

IAS · 2020 · Q70 Relevance score: 2.64

With reference to "Blockchain Technology", consider the following statements : 1. It is a public ledger that everyone can inspect, but which no single user 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 ?

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With reference to Web 3-0, consider the following statements : 1. Web 3.0 technology enables people to control their own data. 2. In Web 3.0 world, there can be blockchain based social networks. 3. Web 3.0 is operated by users collectively rather than a corporation. Which of the statements given above are correct ?

IAS · 2016 · Q84 Relevance score: 1.07

Regarding 'DigiLocker', sometimes seen in the news, which of the following statements is/are correct? 1. It is a digital locker system offered by the Government under Digital India Programme. 2. It allows you to access your e-documents irrespective of your physical location. Select the correct answer using the code given below.

CDS-II · 2011 · Q90 Relevance score: 0.80

Which of the following statements about the Crime and Criminal Tracking Network System (CCTNS) is/are correct ? 1. It will facilitate real time access of classified criminal data to the law enforcement authorities. 2. National Crime Record Bureau is the nodal agency mandated to implement the network in all the states. Select the correct answer using the code given below :