Interoperability in Blockchain Systems BFC Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   Which interoperability protocol enables two parties to exchange assets across different blockchains without a trusted intermediary by using time-locked contracts?

   • AAtomic swap
   • BNotary scheme
   • CSidechain
   • DRelay chain
   Reveal Solution Discussion Select an answer first
2. 37expert · hard

   A consortium of banks is designing a cross-chain settlement system between a permissioned Hyperledger Fabric network and a public Ethereum network. The design must minimize trust in any single entity while ensuring that transactions finalize on both chains. Which approach best balances these constraints?

   • AImplement an atomic swap using HTLCs between the Fabric and Ethereum networks.
   • BUse a relay chain that verifies consensus proofs from both networks and finalizes transactions automatically.
   • CUse a single notary operated by one of the banks to validate and relay transactions between the two networks.
   • DDeploy a federated notary scheme with multiple banks signing off on cross-chain transactions.
   Reveal Solution Discussion Select an answer first
4. 38application · medium

   A global payments company wants to connect its blockchain-based settlement network to multiple traditional financial institutions that use different messaging formats. The company needs a protocol that can route payments across different ledgers and systems, including both blockchain and non-blockchain networks. Which standard or framework is designed for this purpose?

   • AISO 20022
   • BAtomic swap protocol
   • CInterledger Protocol (ILP)
   • DSidechain protocol
   Reveal Solution Discussion Select an answer first
5. 39application · medium

   A bank is using a blockchain to record trade finance transactions. The bank wants to automatically trigger payments in its legacy core banking system when certain conditions are met on the blockchain. The legacy system does not support blockchain protocols. Which type of interoperability should the bank implement?

   • ASidechain interoperability using a two-way peg
   • BCross-chain interoperability using a relay chain
   • COff-chain interoperability using an API or middleware
   • DOn-chain interoperability using smart contracts
   Reveal Solution Discussion Select an answer first
6. 40expert · hard

   A cross-chain bridge is being designed to transfer assets between a high-throughput blockchain with low fees and a highly secure blockchain with higher fees. The bridge must minimize the risk of a malicious validator stealing funds. Which design choice best addresses this risk?

   • AUse a notary scheme with a hardware security module (HSM) to protect the validator's keys.
   • BUse a single trusted validator with a strong reputation.
   • CUse a federated set of validators with a multisignature scheme and economic staking.
   • DUse a relay chain that relies on the high-throughput chain's consensus for security.
   Reveal Solution Discussion Select an answer first