Blockchain Integration with Emerging Technologies BDC Practice Questions (Page 13)

Questions 61–65

1. 61application · medium

   A virtual reality platform allows users to buy virtual land and unique items. The platform wants to ensure that users truly own their assets and can trade them outside the platform. Which blockchain integration approach best supports this?

   • AUse a sidechain that is not connected to the main blockchain
   • BStore ownership records in the platform's central database
   • CUse a permissioned blockchain only for in-platform transactions
   • DIssue non-fungible tokens (NFTs) on a public blockchain to represent virtual land and items
   Reveal Solution Discussion Select an answer first
2. 62foundation · easy

   What is an atomic swap in blockchain interoperability?

   • AA centralized exchange that holds funds
   • BA peer-to-peer exchange of assets across different blockchains without a trusted intermediary
   • CA method to merge two blockchains into one
   • DA way to delete transactions from a blockchain
   Reveal Solution Discussion Select an answer first
4. 63expert · hard

   A global food distributor wants to trace a product from farm to store. They need to prove the origin of each batch and automatically trigger recalls when a batch is contaminated. The supply chain involves many small farmers with limited technical resources. Which solution is most practical?

   • AA centralized database with manual recall procedures
   • BA public blockchain that stores all product details in full for maximum transparency
   • CA permissioned blockchain where each participant records batch hashes and smart contracts automate recall notifications
   • DA sidechain that only records the final sale, not the full journey
   Reveal Solution Discussion Select an answer first
5. 64application · medium

   A social media startup wants to give users control over their data and allow them to earn tokens for viewing ads. They also want to prevent the platform from censoring content arbitrarily. Which blockchain design best supports these goals?

   • AA decentralized application (dApp) on a public blockchain where user data is stored in encrypted form and content moderation is governed by smart contracts
   • BA sidechain for token rewards, but with user data stored on a private server
   • CA permissioned blockchain where only the platform can read user data and moderate content
   • DA centralized platform with a token reward system, but with the company retaining full control over data and content
   Reveal Solution Discussion Select an answer first
6. 65foundation · easy

   How does blockchain reduce identity fraud?

   • ABy using simple passwords
   • BBy using cryptographic proofs that are difficult to forge
   • CBy storing all identity data in a central database
   • DBy making all identity data public
   Reveal Solution Discussion Select an answer first