Interoperability Challenges in Blockchain Systems BFC Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Why do data format inconsistencies pose a challenge to blockchain interoperability?

   • AThey prevent the use of public-key cryptography
   • BThey make it difficult for different blockchains to interpret and validate each other's transactions
   • CThey increase the block size limit of a blockchain
   • DThey cause the blockchain to become centralized
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A financial institution is planning to use a public blockchain interoperability protocol to transfer transaction data between its branches in different countries. The institution is subject to the General Data Protection Regulation (GDPR) in the EU and similar data protection laws in other jurisdictions. The compliance officer asks the IT team to ensure that the protocol does not violate data privacy laws. Which action is most appropriate?

   • AUse a private permissioned blockchain for all cross-border transfers to avoid public exposure of personal data.
   • BStore all personal data on the blockchain itself so that it is immutable and cannot be altered.
   • CConduct a data protection impact assessment (DPIA) to identify and mitigate privacy risks before implementing the protocol.
   • DEnsure that all personal data is encrypted before it is sent through the interoperability protocol.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   What is the primary role of cross-chain interoperability in blockchain networks?

   • ATo allow smart contracts on the same blockchain to interact with each other
   • BTo connect a blockchain to traditional financial systems like SWIFT
   • CTo improve the scalability of a single blockchain by adding more nodes
   • DTo enable the transfer of assets and data between different blockchain networks
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5. 4application · medium

   A cross-border payment consortium is using a blockchain interoperability protocol that connects member banks in multiple countries. The protocol allows transaction data to be shared across chains. The consortium must comply with the EU's General Data Protection Regulation (GDPR) and the US's Anti-Money Laundering (AML) regulations. Which design feature is most important to address both regulatory frameworks?

   • AUsing a notary scheme that keeps all data off-chain and only shares hashes.
   • BImplementing a data minimization layer that only shares necessary transaction references across chains.
   • CRouting all transactions through a single jurisdiction to simplify legal compliance.
   • DStoring all transaction data on a single public blockchain to ensure transparency.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   Two parties want to exchange 10 ETH on Ethereum for 100,000 USDC on a different blockchain. They want to avoid using a centralized exchange and want to ensure that either both transfers happen or neither does. Which interoperability solution is specifically designed for this use case?

   • AAtomic swap using hash time-locked contracts (HTLCs) on both chains.
   • BSidechain pegged to Ethereum that holds the USDC.
   • CRelay chain that forwards the transaction from Ethereum to the other blockchain.
   • DNotary scheme where a trusted third party coordinates the exchange.
   Reveal Solution Discussion Select an answer first