Smart Contracts and dApp Design for Business BBLC Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   When integrating a smart contract into an existing business workflow, what is the primary purpose of creating an off-chain oracle?

   • ATo store large amounts of business data on the blockchain.
   • BTo allow the smart contract to modify its own code after deployment.
   • CTo provide the smart contract with real-world data that is not natively available on the blockchain.
   • DTo replace the need for a backend server in the business workflow.
   Reveal Solution Discussion Select an answer first
2. 37expert · hard

   A consortium of banks is building a dApp for cross-border trade finance. The dApp must handle confidential transaction data, require high throughput, and be accessible to non-technical users. The consortium has decided to use a private permissioned blockchain based on Ethereum. Which architecture best meets these requirements?

   • AA permissioned network with a centralized off-chain database for user-facing queries and a smart contract for settlement logic.
   • BA public Ethereum network with all transaction data encrypted on-chain.
   • CA private network with all data stored on-chain and a complex UI for users to interact directly with the smart contract.
   • DA hybrid architecture using a public blockchain for settlement and a private database for confidential data, with users interacting through a mobile app.
   Reveal Solution Discussion Select an answer first
4. 38expert · hard

   A government agency is building a dApp for citizens to apply for permits. The dApp must be accessible to citizens with varying levels of digital literacy and must ensure that applications are processed transparently. The agency has a legacy system for permit processing. What is the best UX and architecture approach?

   • ARequire citizens to install a browser extension and manage their own private keys to submit applications directly to the smart contract.
   • BUse a mobile app that displays raw transaction data and requires users to confirm each transaction manually.
   • CReplace the legacy system entirely with a fully decentralized application that handles all permit processing on-chain.
   • DProvide a simple web form that submits data to an off-chain server, which then interacts with the smart contract on behalf of the citizen.
   Reveal Solution Discussion Select an answer first
5. 39application · medium

   A manufacturing company wants to automate royalty payments to multiple suppliers based on the quantity of raw materials used in each production batch. The quantity data is recorded in their existing ERP. What is the most appropriate smart contract design?

   • AA single smart contract that receives batch quantity data from an oracle and distributes payments to each supplier's address.
   • BA separate smart contract for each supplier, each with its own oracle.
   • CA smart contract that stores all historical batch data on-chain for transparency.
   • DA smart contract that directly reads the ERP database using an API call.
   Reveal Solution Discussion Select an answer first
6. 40application · medium

   A music licensing company wants to automate royalty payments to artists whenever a song is streamed. The smart contract should receive streaming data and distribute payments proportionally. Which aspect of smart contract design is most critical for this use case?

   • AThe contract must be able to store large audio files on-chain.
   • BThe contract must be able to mine new tokens to fund the payments.
   • CThe contract must have a function that accepts streaming data and calculates payments based on predefined rules.
   • DThe contract must be able to generate random numbers for selecting artists.
   Reveal Solution Discussion Select an answer first