Building and Scaling dApps with AI and Smart Contracts BBLC Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which of the following is a typical method for integrating AI into a dApp to improve user interaction?

   • AEmbedding a natural language processing model in the smart contract to interpret user commands
   • BUsing an oracle to fetch AI-generated insights from an off-chain service and then using those insights in the smart contract
   • CStoring the AI model's weights in the smart contract's storage for on-chain inference
   • DHaving the smart contract call an external AI API directly without any intermediary
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A decentralized gaming dApp has a large number of microtransactions that are causing network congestion. The team wants to use AI to optimize transaction batching without affecting the user experience. What is the best approach?

   • AUse AI to group microtransactions into batches and submit them at optimal times when network fees are low.
   • BUse a centralized server to process microtransactions and only settle periodically on-chain.
   • CSubmit each microtransaction immediately to ensure real-time processing.
   • DIncrease the gas price for all transactions to prioritize them.
   Reveal Solution Discussion Select an answer first
4. 3expert · hard

   A voting dApp uses an AI model to detect duplicate or fraudulent votes. The model runs off-chain and sends a flag to a smart contract that invalidates the vote. The team is concerned about the AI model being a single point of failure and about the privacy of voters. Which architecture best addresses both concerns?

   • AHave the AI model run on a single trusted server and rely on its reputation.
   • BUse a simple rule-based system instead of AI to detect duplicates.
   • CStore all voter data on-chain so that the AI model can analyze it directly.
   • DUse a decentralized oracle network with multiple AI models that each return a vote validity verdict, and require a supermajority to invalidate a vote, while using zero-knowledge proofs to keep voter identities private.
   Reveal Solution Discussion Select an answer first
5. 4expert · hard

   A decentralized identity dApp uses AI to verify user documents. The AI model processes sensitive personal data off-chain. The team wants to ensure that users' data is not exposed to the AI service provider. What is the best approach?

   • ASend the raw data to the AI service provider and rely on a confidentiality agreement.
   • BUse a trusted execution environment (TEE) on the AI service provider's infrastructure.
   • CStore the raw data on the blockchain so that it is transparent and immutable.
   • DUse homomorphic encryption to allow the AI model to process encrypted data without decrypting it.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A gaming dApp on Ethereum is experiencing high gas costs and slow transaction times during peak usage. The team wants to use AI to improve performance without compromising the integrity of the game state. Which approach should they take?

   • AMove non-critical game actions off-chain and use AI to batch and settle them on-chain periodically.
   • BIncrease the block gas limit by submitting a proposal to the Ethereum network.
   • CSwitch to a proof-of-authority consensus to increase block size and speed.
   • DUse an AI model to predict peak load times and automatically adjust the gas price for transactions during those periods.
   Reveal Solution Discussion Select an answer first