Innovations in Blockchain Architecture and Smart Contract Platforms BBLC Practice Questions (Page 6)

Questions 26–30

1. 26expert · hard

   A multinational corporation is designing a blockchain for cross-border supply chain tracking. They need to comply with the EU's General Data Protection Regulation (GDPR), which includes the right to erasure. They also need to maintain an immutable audit trail. Which design pattern best reconciles these conflicting requirements?

   • AStore personal data off-chain and keep only hashes on-chain, with a mechanism to delete the off-chain data
   • BStore all personal data on-chain and rely on cryptographic deletion
   • CAvoid storing any data on-chain and use a traditional database
   • DUse a private blockchain with a hard fork to erase data when requested
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   When comparing smart contract platforms, which aspect is most relevant to developer tooling?

   • AThe number of validator nodes
   • BAvailability of software development kits (SDKs) and testing frameworks
   • CThe maximum block size
   • DThe block time of the underlying network
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A logistics company uses a private blockchain for internal tracking but needs to share shipment status with external partners who use a different blockchain platform. They want a seamless, automated exchange of data without manual reconciliation. What should they implement?

   • AA sidechain that requires all partners to migrate to the same platform
   • BA centralized database that mirrors data from both blockchains
   • CA smart contract that directly reads the other blockchain's state
   • DAn interoperability protocol that enables cross-chain asset and data transfer
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   A bank is choosing a smart contract platform for a trade-finance application. The bank requires a permissioned network, high transaction throughput, and the ability to write contracts in Java. Which platform choice best aligns with these requirements?

   • AQuorum with IBFT consensus and Solidity smart contracts
   • BHyperledger Fabric with a Raft ordering service and Java chaincode
   • CCorda with a notary service and Kotlin smart contracts
   • DEthereum with a Proof-of-Stake consensus and Solidity smart contracts
   Reveal Solution Discussion Select an answer first
6. 30expert · hard

   A consortium of retailers wants to track product provenance on a blockchain. They need to share data with regulators, but they also want to protect trade secrets. They are considering a permissioned blockchain with a BFT consensus. Which additional feature is essential to meet both transparency and confidentiality?

   • APrivate data collections that restrict visibility to authorized parties
   • BAn off-chain database for all data
   • CA public audit trail of all transactions
   • DA single shared ledger with full visibility for all members
   Reveal Solution Discussion Select an answer first