Enterprise Blockchain BBLC Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A healthcare consortium stores patient records on a permissioned blockchain. They must comply with GDPR, which requires the right to erasure, but they also need to maintain an immutable audit trail for regulatory purposes. Which design best balances these requirements?

   • AUse a private channel to store personal data
   • BStore personal data on-chain and use a redaction mechanism
   • CStore personal data on-chain and rely on encryption
   • DStore personal data off-chain and keep only hashes on-chain, with a separate immutable audit log
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A government agency is deploying a blockchain for land registry records. They need to ensure that only authorized officials can update records, while citizens can verify ownership. Which feature is essential for this use case?

   • APermissioned access
   • BHigh transaction throughput
   • CZero-knowledge proofs
   • DPublic write access
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A group of competing retailers wants to share inventory data on a blockchain to improve supply chain visibility. They need to control who can read and write data, and they must comply with antitrust regulations that prohibit collusion on pricing. Which type of blockchain should they use?

   • AA private blockchain owned by one retailer
   • BA permissionless blockchain with smart contract restrictions
   • CA public blockchain with encrypted data
   • DA permissioned blockchain with role-based access controls
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A company is considering adopting an enterprise blockchain but is concerned about the lack of standardization and interoperability with other blockchains. What is the most effective mitigation approach?

   • AAvoid blockchain altogether and use a centralized database.
   • BUse a public blockchain to ensure universal interoperability.
   • CAdopt a platform that supports industry standards and invest in interoperability solutions.
   • DWait for the market to consolidate before adopting.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A logistics company is deploying a permissioned blockchain for tracking shipments among known partners. They need high throughput and finality in seconds, but they do not require the ability to tolerate arbitrary malicious nodes. Which consensus mechanism is most suitable?

   • ARaft
   • BProof of Stake (PoS)
   • CDelegated Proof of Stake (DPoS)
   • DProof of Work (PoW)
   Reveal Solution Discussion Select an answer first