Interoperability in BaaS Platforms BFC Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A fintech company is tokenizing real estate assets on a BaaS platform. It wants to allow investors to trade these tokens on a public blockchain exchange. The company needs to ensure that the token's ownership and transfer history remain consistent between the private issuance chain and the public trading chain. Which mechanism should the company use?

   • AA notary scheme that only records the final ownership on the public chain.
   • BA cross-chain bridge with a lock-and-mint mechanism, where tokens are locked on the private chain and equivalent tokens are minted on the public chain.
   • CA sidechain that runs in parallel to the public chain without any peg.
   • DAn atomic swap between the private and public chains for each trade.
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A consortium of banks is using a BaaS platform to enable cross-border payments. Each bank runs its own blockchain node, and the consortium wants to ensure that a payment initiated on one bank's node can be settled on another bank's node without requiring a trusted intermediary. Which protocol should the consortium adopt?

   • AHyperledger Cactus
   • BA custom API
   • CISO 20022
   • DInterledger Protocol (ILP)
   Reveal Solution Discussion Select an answer first
4. 18expert · hard

   A global bank uses a BaaS platform to interoperate with multiple public blockchains for cross-border payments. The bank's legal team is concerned about data privacy regulations (e.g., GDPR) because transaction data may be replicated on public chains. The bank wants to continue using public chains but must ensure compliance. Which approach best balances compliance and interoperability?

   • AStop using public chains and only use private permissioned blockchains.
   • BAnonymize all personal data before writing to the public chain.
   • CStore all transaction data on the public chain in an encrypted format.
   • DUse a privacy-preserving layer (e.g., zero-knowledge proofs) that validates transactions on the public chain without revealing personal data.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   How do BaaS platforms typically achieve interoperability with legacy financial systems?

   • ABy using APIs and middleware to connect blockchain networks with existing databases and applications
   • BBy using a single proprietary protocol that all legacy systems must adopt
   • CBy requiring all legacy systems to be replaced with blockchain-based equivalents
   • DBy storing all legacy data directly on the blockchain
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   A bank is using a BaaS platform with a cross-chain bridge to transfer assets between a private chain and a public chain. The bridge uses a multi-signature wallet controlled by several validators. The bank's risk team is concerned about the security of the bridge. Which additional control would most effectively reduce the risk of a single validator compromise leading to asset theft?

   • ARequire a higher threshold of validator signatures (e.g., 5-of-7 instead of 3-of-5) for bridge transactions.
   • BUse a single trusted validator to speed up bridge transactions.
   • CStore the private keys of all validators in a single hardware security module (HSM).
   • DIncrease the number of validators without changing the signature threshold.
   Reveal Solution Discussion Select an answer first