Blockchain Integration with Emerging Technologies BDC Practice Questions (Page 12)

Questions 56–60

1. 56foundation · easy

   What is a primary concern when integrating blockchain with big data systems?

   • AInability to store any data off-chain
   • BLack of any encryption methods
   • CAutomatic deletion of old records
   • DScalability due to blockchain's limited transaction throughput
   Reveal Solution Discussion Select an answer first
2. 57application · medium

   A startup wants to offer a decentralized cloud storage service where users can rent out unused disk space. They plan to use a blockchain for payments and reputation, but they need to store large files efficiently. Which approach best combines blockchain with cloud storage?

   • AStore file content in a distributed storage network and record only content hashes and metadata on the blockchain
   • BUse a sidechain for file storage and a mainchain for payments
   • CUse a traditional cloud provider and ignore blockchain entirely
   • DStore entire files on the blockchain to ensure immutability
   Reveal Solution Discussion Select an answer first
4. 58application · medium

   A city is deploying a fleet of autonomous delivery robots that need to pay each other for charging services at shared stations. The robots must authenticate each other without a central server, and every payment must be recorded immutably. Which blockchain-based approach best meets these needs?

   • AUse a public blockchain with a single shared wallet for all robots
   • BDeploy a permissioned blockchain where each robot has a unique identity and smart contracts handle micropayments between robots
   • CRely on the charging stations to record payments in a local database
   • DUse a centralized payment gateway with a blockchain audit trail
   Reveal Solution Discussion Select an answer first
5. 59expert · hard

   A social media startup wants to give users control over their data and allow them to earn tokens for content. They also need to comply with the EU's General Data Protection Regulation (GDPR), which includes the right to erasure. This creates a conflict because blockchain is immutable. Which approach best resolves this conflict?

   • AUse a permissioned blockchain and allow administrators to delete data
   • BUse a sidechain for each user's data
   • CStore all user data on a public blockchain to ensure transparency
   • DStore personal data off-chain and use blockchain only for content hashes and token transactions
   Reveal Solution Discussion Select an answer first
6. 60application · medium

   A game developer wants to allow players to trade in-game items outside the game marketplace. They want to ensure that items are scarce and that ownership is verifiable by any party. Which blockchain approach is most suitable?

   • AIssue in-game items as non-fungible tokens (NFTs) on a public blockchain, with smart contracts for trading
   • BStore item ownership in the game's central database and allow trading only through the game's marketplace
   • CUse a permissioned blockchain for item ownership, but only allow the game developer to mint new items
   • DUse a sidechain for item trading, but keep the item metadata off-chain in a private server
   Reveal Solution Discussion Select an answer first