Core Protocols and Liquidity Mechanisms in DeFi BFC Practice Questions (Page 7)

Questions 31–35

1. 31application · medium

   A DeFi lending protocol uses a price oracle to determine collateral value. A borrower has deposited ETH as collateral and borrowed USDC. The oracle's price feed for ETH is manipulated upward temporarily. What is the most direct risk to the protocol?

   • ALiquidators will be unable to identify undercollateralized positions
   • BBorrowers can draw more debt than their collateral actually supports, increasing the risk of bad debt
   • CThe protocol's governance token will be minted excessively
   • DThe interest rate model will set rates to zero
   Reveal Solution Discussion Select an answer first
2. 32expert · hard

   A DeFi protocol is designing a liquidity mining program to attract LPs. The team is considering two options: (1) distribute rewards continuously to all LPs proportional to their share, or (2) distribute rewards in a time-weighted manner that increases over time. The protocol's goal is to attract long-term liquidity rather than short-term 'farmers' who deposit and withdraw quickly. Which approach is more aligned with this goal, and what is the trade-off?

   • ATime-weighted rewards, because they incentivize LPs to stay longer, but they may be less attractive to new LPs who prefer immediate rewards
   • BNeither approach can influence LP behavior; only trading fees matter
   • CBoth approaches are identical in their effect on LP behavior
   • DContinuous proportional rewards, because they are simpler and attract the most LPs
   Reveal Solution Discussion Select an answer first
4. 33expert · hard

   A liquidity provider is deciding between two pools: Pool A is a stablecoin pair (USDC/DAI) with low volatility and low fees. Pool B is a volatile pair (ETH/BTC) with higher fees and a liquidity mining reward. The provider expects ETH/BTC to remain relatively stable over the next month. Which pool is likely to produce a better risk-adjusted return, assuming the provider wants to minimize impermanent loss?

   • APool A, because the stablecoin pair has minimal impermanent loss, and the provider avoids the risk of divergence loss
   • BPool A, because stablecoin pools always generate the highest trading volume
   • CPool B, because the higher fees and mining rewards will always outweigh any impermanent loss
   • DPool B, because ETH/BTC is a more established pair with deeper liquidity
   Reveal Solution Discussion Select an answer first
5. 34foundation · easy

   In an automated market maker (AMM) like Uniswap, what is the primary role of the constant product formula (x * y = k)?

   • AIt determines the price of a trade based on the relative sizes of the two token reserves in the pool.
   • BIt calculates the total value locked in the liquidity pool.
   • CIt ensures that the pool always maintains an equal dollar value of both tokens.
   • DIt sets the fee percentage that liquidity providers earn on each trade.
   Reveal Solution Discussion Select an answer first
6. 35foundation · easy

   What is the primary role of an oracle in a DeFi protocol?

   • ATo store encrypted user data on the blockchain.
   • BTo execute trades on behalf of users automatically.
   • CTo provide external data, such as asset prices, to smart contracts in a reliable and tamper-resistant manner.
   • DTo validate transactions and add new blocks to the blockchain.
   Reveal Solution Discussion Select an answer first