Unit 6: Non-financial applications of blockchain - Practice Quiz

1 What does the abbreviation IoT stand for?

2 How can blockchain help secure IoT devices?

3 A key benefit of combining blockchain with IoT is the removal of what?

4 In supply chain management, blockchain is mainly used to improve what?

5 What does the term provenance mean in a blockchain supply chain?

6 Which feature of blockchain helps prevent counterfeit products in a supply chain?

7 In healthcare, blockchain is often used to securely store what?

8 A major benefit of blockchain in healthcare is improved what for patient data?

9 How can blockchain help in tracking pharmaceutical drugs?

10 Blockchain-based voting systems aim to improve what aspect of elections?

11 How can governments use blockchain for land records?

12 What is a common government use case for blockchain in identity management?

13 In education, blockchain is commonly used to issue what?

14 A benefit of blockchain-based academic credentials is that they are hard to do what?

15 How does blockchain help students who move between institutions?

16 In media and entertainment, blockchain can help creators manage what?

17 Which blockchain-based asset is commonly used to represent ownership of digital art?

18 How can blockchain help pay musicians more fairly?

19 How can blockchain improve charitable donations?

20 A social impact use of blockchain is providing digital identity for whom?

21 In a blockchain-based IoT network, thousands of low-power sensors need to record data immutably. Which design choice BEST addresses the limited computational power of these devices?

22 A smart-home system uses blockchain to let devices autonomously pay for services. What blockchain feature primarily enables this machine-to-machine automation?

23 A food distributor wants to trace a contaminated batch back to its origin within seconds. How does a blockchain-based supply chain primarily achieve this rapid traceability?

24 In a blockchain supply chain, physical goods must be reliably linked to their digital records. Which combination BEST ensures this link?

25 Why is a permissioned (consortium) blockchain often preferred over a fully public blockchain for enterprise supply chains?

26 A hospital network wants patients to control who accesses their records across providers. Which blockchain pattern BEST supports this while protecting privacy?

27 How does blockchain primarily help combat counterfeit pharmaceuticals in the drug supply chain?

28 A clinical trial team wants to prove that trial data was not altered after collection. Which blockchain property most directly provides this assurance?

29 A government deploys a blockchain-based land registry. What is the PRIMARY advantage over a traditional centralized registry?

30 In a blockchain-based voting system, which feature is MOST important for ensuring both verifiability and voter privacy?

31 A city issues blockchain-based digital identities to citizens. Which concept allows a citizen to prove they are over 18 without revealing their exact birth date?

32 A university issues diplomas on a blockchain. How does an employer verify a candidate's degree most efficiently in this system?

33 What is a key benefit of self-sovereign, blockchain-based academic credentials for students?

34 An online learning platform uses tokens to reward course completion. Which design concern is MOST critical to keep the reward system trustworthy?

35 A musician uses blockchain to receive royalties automatically whenever their song is streamed. Which mechanism enables this instant, rule-based payment split among collaborators?

36 How do NFTs primarily help digital artists establish authenticity and ownership of their work?

37 A streaming platform wants to reduce piracy by proving content licensing rights. Which blockchain capability is MOST relevant?

38 An NGO distributes aid using blockchain to track donations end to end. What is the PRIMARY social benefit of this approach?

39 How can blockchain-based digital identity support financial inclusion for unbanked populations?

40 A carbon-credit platform uses blockchain to prevent the same credit from being counted twice. Which property most directly prevents this "double counting"?

41 In an IoT network using blockchain, millions of low-power sensors must record data. A design team proposes storing every raw sensor reading directly on a public proof-of-work chain. What is the most fundamental architectural flaw in this approach?

42 A smart-home IoT device uses a blockchain oracle to trigger payments when a condition is met. An attacker compromises only the oracle feed, not the chain itself. Which security property of the overall system is primarily undermined?

43 A food supply chain places IoT-logged provenance on a permissioned blockchain. During an audit a contaminated batch is traced correctly on-chain, yet the physical product does not match the record. Which classic limitation does this illustrate?

44 Two competing manufacturers share one consortium supply-chain ledger. Each needs to verify shipment totals without revealing proprietary volumes to the other. Which cryptographic technique best resolves this tension?

45 A hospital wants patient records on blockchain while complying with GDPR's right to erasure. Why does naive on-chain storage of personal health data create a legal conflict?

46 A blockchain health-data platform gives patients control via private keys. From a systems-design standpoint, what is the most serious patient-facing risk unique to this model?

47 A nation pilots blockchain-based voting. Critics argue it does not solve the hardest problem in elections. Which problem remains fundamentally unaddressed by the ledger alone?

48 A land-registry blockchain is deployed to stop fraudulent title transfers. A corrupt official still registers a fraudulent but validly signed title. What does this reveal about blockchain's trust model?

49 A university issues diplomas as blockchain credentials. An employer verifies one years later after the university's verification server goes offline. Which design choice determines whether verification still succeeds?

50 A consortium of universities debates revoking a mistakenly issued blockchain credential. Given immutability, what is the correct mechanism to handle revocation?

51 A music platform uses smart contracts to split royalties automatically among rights holders. A dispute arises because a sampled track's rights were never on-chain. What inherent limitation does this expose?

52 An NFT is used to represent ownership of a digital artwork. A buyer assumes owning the NFT means owning the copyright. Why is this assumption typically incorrect?

53 An NGO distributes aid via blockchain to reduce corruption in a region with low connectivity and smartphone penetration. Which factor most threatens the program's real-world effectiveness?

54 A refugee identity program stores self-sovereign identities on a public blockchain. A human-rights analyst warns of a privacy risk that is worse than in centralized systems. What is it?

55 A designer chooses a DAG-based ledger (e.g., tangle style) over a linear blockchain for an IoT micropayment network. What is the primary motivation for this choice?

56 A global supply chain spans vendors on three different blockchain platforms. Goods must move with verifiable provenance across all three. Which capability is essential to achieve this?

57 A clinical-trial consortium wants an auditable, tamper-evident log of trial data edits but needs regulator-only read access. Which deployment model best fits these requirements?

58 A tax authority considers putting all citizen financial records on an immutable public ledger for transparency. An economist flags a subtle systemic risk beyond privacy. What is it?

59 A MOOC platform awards skill badges on-chain. To make badges meaningful to employers, which design property matters most beyond simply being on a blockchain?

60 A streaming service uses a public blockchain to timestamp content for anti-piracy proof of first publication. A pirate copies the content but cannot alter the timestamp record. What does the blockchain actually prove, and what does it NOT prove?