Blockchain Ecosystem and Use Cases BDC Practice Questions (Page 10)

Questions 46–50

1. 46foundation · easy

   What is the primary challenge of blockchain interoperability?

   • ABlockchains are too fast to communicate with each other
   • BBlockchains do not have enough storage capacity
   • CThere are not enough blockchain developers
   • DDifferent blockchains use different protocols, consensus mechanisms, and data formats
   Reveal Solution Discussion Select an answer first
2. 47expert · hard

   A fintech company wants to tokenize a portfolio of real estate assets and offer them to retail investors across multiple countries. They must comply with securities regulations in each jurisdiction, which have different rules on investor accreditation and transfer restrictions. The company wants to automate compliance while maintaining liquidity. What is the most effective approach?

   • AAvoid blockchain and use a traditional securities registry to ensure compliance
   • BIssue a single global token and rely on investors to self-certify their accreditation status
   • CUse a smart contract that enforces transfer restrictions based on investor accreditation and jurisdiction-specific rules
   • DCreate a separate token for each jurisdiction and list them on different exchanges
   Reveal Solution Discussion Select an answer first
4. 48expert · hard

   A global supply chain consortium uses a permissioned Hyperledger Fabric network for tracking goods. They want to share shipment data with a public Ethereum-based platform used by customs authorities. The consortium has strict data privacy requirements and cannot expose all transaction details. They also need to prove the authenticity of the shared data. What is the most appropriate interoperability approach?

   • AMigrate the entire supply chain network to Ethereum to achieve native interoperability
   • BDeploy an oracle service that reads selected data from Fabric and submits a hash to Ethereum, with the raw data shared via a private channel
   • CSet up a two-way peg bridge between Hyperledger Fabric and Ethereum
   • DUse a sidechain that mirrors all Fabric transactions onto Ethereum
   Reveal Solution Discussion Select an answer first
5. 49application · medium

   A pharmaceutical company wants to use blockchain to track temperature-sensitive vaccines from manufacturing to administration. They need to ensure that only authorized parties can add data, that the data cannot be altered once recorded, and that regulators can audit the entire chain. Which combination of blockchain features would best meet these requirements?

   • AA public blockchain with open participation and a proof-of-work consensus mechanism
   • BA centralized database with cryptographic hashes stored off-chain
   • CA consortium blockchain with no access controls but strong encryption of all data
   • DA private permissioned blockchain with role-based access control and an append-only ledger
   Reveal Solution Discussion Select an answer first
6. 50application · medium

   A hospital network wants to use blockchain to share patient consent records across different healthcare providers. They need to ensure that consent can be updated and revoked by patients, and that all providers see the latest consent status. Which approach is most effective?

   • AUse a sidechain to store consent records and periodically update the main chain.
   • BUse a smart contract that stores the consent status and allows patients to update or revoke consent through transactions.
   • CUse a centralized database and periodically sync with a blockchain.
   • DUse a public blockchain to store consent records for maximum transparency.
   Reveal Solution Discussion Select an answer first