Integrating DeFi with FinTech Platforms BFC Practice Questions (Page 8)

Questions 36–40

1. 36expert · hard

   A fintech platform is integrating a DeFi exchange aggregator that routes trades across multiple DEXs. The platform's backend needs to provide users with real-time quotes and execute trades. The team is concerned about the latency of querying multiple DEXs and the risk of stale prices. Which approach best addresses both concerns?

   • AUse a middleware service that caches quotes from DEXs for a few seconds and uses a decentralized oracle for price validation before executing trades.
   • BQuery all DEXs in real-time for every quote request and execute the trade immediately without any price validation.
   • CUse only one DEX to avoid the complexity of aggregating multiple sources, and rely on its built-in price feed.
   • DExecute trades only when the price difference between DEXs exceeds a certain threshold, to ensure the trade is profitable.
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2. 37application · medium

   A traditional bank is exploring DeFi integration to offer its corporate clients access to on-chain liquidity. The bank's legal team is concerned about the enforceability of smart contracts and the lack of a legal framework. Which approach is most likely to address these concerns?

   • AAvoid DeFi entirely because smart contracts are never legally enforceable.
   • BRely solely on the smart contract code as the final authority, with no legal documentation.
   • CUse a permissioned DeFi protocol that includes a legal wrapper, such as a terms-of-service agreement and an arbitration clause, alongside the smart contract.
   • DUse a public, permissionless DeFi protocol and assume that the code is law and that no legal issues will arise.
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4. 38foundation · easy

   What is a common approach to abstracting DeFi complexity in a user interface while maintaining transparency?

   • ARequire users to understand blockchain technology before using the platform
   • BDisplay raw smart contract code to users for every transaction
   • CHide all transaction details from users to avoid confusion
   • DUse simple language and visualizations to explain complex DeFi operations, while providing access to detailed information for advanced users
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5. 39expert · hard

   A fintech platform is integrating a DeFi lending protocol on Ethereum mainnet. During peak load, users experience transaction delays and high gas fees. The team is considering using a Layer 2 (L2) solution. Which consideration is most important when deciding between an optimistic rollup and a zero-knowledge (ZK) rollup for this integration?

   • AThe number of tokens supported: optimistic rollups support only ERC-20 tokens, while ZK rollups support only ETH.
   • BThe need for a trusted setup: optimistic rollups require a trusted setup, while ZK rollups do not.
   • CThe programming language used to write smart contracts: optimistic rollups require Solidity, while ZK rollups require Rust.
   • DThe withdrawal finality time: optimistic rollups have a challenge period (often ~7 days) for withdrawals, while ZK rollups provide faster finality.
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6. 40foundation · easy

   What is a common pitfall observed in real-world DeFi-FinTech integrations?

   • AOveremphasizing user education, leading to low adoption
   • BUsing too many different blockchain networks, which simplifies integration
   • CUnderestimating the importance of security audits for smart contracts
   • DFocusing too much on regulatory compliance, which is unnecessary
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