Smart Contracts and dApp Design for Business BBLC Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A manufacturing firm wants to integrate smart contracts into its existing ERP system to automate purchase orders. The ERP team is concerned about data consistency and audit trails. Which integration strategy best addresses these concerns?

   • AUse smart contracts only for new orders, leaving existing ERP data untouched.
   • BUse a middleware layer that syncs ERP data with the blockchain, maintaining the ERP as the system of record.
   • CReplace the ERP system entirely with a suite of smart contracts.
   • DRun the ERP and blockchain in parallel with no integration, duplicating data entry.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A startup is building a dApp for token-based crowdfunding. They want to allow contributors to receive a refund if the funding goal is not met by the deadline. Which smart contract design pattern should they implement?

   • AFactory pattern to create a new contract instance for each campaign.
   • BWithdrawal pattern to allow contributors to claim their refunds.
   • CEmergency stop pattern to pause the contract if something goes wrong.
   • DState machine pattern to track the campaign through funding, success, and refund states.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A healthcare startup is creating a dApp for patients to manage consent for data sharing. The users are not technical and need to feel confident about privacy. Which UX feature is most important to include?

   • ADisplaying the raw transaction hash and gas cost for every consent action.
   • BA simple dashboard that shows consent status and allows toggling permissions with plain-language explanations.
   • CRequiring users to manually enter their private key each time they change consent.
   • DA chat interface that lets users send natural language commands to the smart contract.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A fintech startup is deploying a dApp for micro-lending. The business model depends on keeping transaction costs low for small loans. The team is considering deploying on a layer-2 solution. What is the most important factor to evaluate before committing?

   • AThe color scheme of the layer-2's user interface.
   • BThe availability of a testnet for the layer-2 solution.
   • CThe security model of the layer-2 solution and its reliance on the underlying mainnet.
   • DThe number of tokens the startup can pre-mine on the layer-2.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is a key principle when designing a dApp user interface for business users who are not familiar with blockchain technology?

   • ARequire users to understand gas fees and transaction hashes before using the app.
   • BDisplay raw blockchain data and technical error messages to ensure transparency.
   • CAbstract blockchain complexity by using familiar business terms and simple confirmations.
   • DForce users to manage private keys directly within the interface.
   Reveal Solution Discussion Select an answer first