Blockchain Integration with Emerging Technologies BDC Practice Questions (Page 9)

Questions 41–45

1. 41foundation · easy

   What type of cryptographic algorithms are being developed to protect blockchain against quantum threats?

   • AQuantum-resistant (post-quantum) algorithms
   • BHash functions without collision resistance
   • CSymmetric key algorithms with short keys
   • DAlgorithms based on unsolved mathematical problems
   Reveal Solution Discussion Select an answer first
2. 42application · medium

   A healthcare consortium wants to train a diagnostic AI model across multiple hospitals without centralizing patient records. Each hospital must be able to verify that the model's training data was not tampered with, and patients must be able to grant or revoke access to their data for each training round. Which combination of blockchain features best addresses these requirements?

   • AStore hashes of training datasets on-chain and use smart contracts to enforce patient-consented data access policies
   • BUse a centralized database with blockchain-based audit logs only
   • CUpload the full training datasets to a public blockchain for transparency
   • DEncrypt all patient data and store the encryption keys on-chain for each hospital
   Reveal Solution Discussion Select an answer first
4. 43application · medium

   A financial institution is planning a blockchain-based digital identity system that must remain secure for the next 20 years. The team is concerned about future quantum computers breaking current digital signatures. Which proactive measure should they take?

   • ARely on the current blockchain's security and wait for a quantum attack to occur
   • BUse longer RSA keys to protect against quantum attacks
   • CMove all identity data off-chain to avoid quantum risks
   • DAdopt quantum-resistant cryptographic algorithms, such as lattice-based signatures, for the identity system
   Reveal Solution Discussion Select an answer first
5. 44application · medium

   A logistics company uses edge devices at warehouses to track inventory. They want to enable secure data exchange between edge nodes and a central system, and also allow automated reordering when stock falls below a threshold. Which solution best meets these needs?

   • AEdge nodes use a public blockchain to store all inventory data in full
   • BEdge nodes run a lightweight blockchain client that records inventory hashes and executes smart contracts for reordering
   • CEdge nodes use a shared cloud database with no blockchain, relying on application logic for reordering
   • DAll edge nodes send data to a single central server that makes all decisions
   Reveal Solution Discussion Select an answer first
6. 45application · medium

   An autonomous vehicle needs to pay a toll booth automatically and securely, and also share its sensor data with nearby vehicles to avoid collisions. The system must work without a central server and ensure that data is authentic. Which blockchain-based approach best meets these needs?

   • AUse a permissioned blockchain with smart contracts for toll payments and signed data messages for vehicle-to-vehicle communication
   • BUse a centralized cloud service for toll payments and data sharing
   • CUse a local database in each vehicle to record payments and data
   • DUse a public blockchain for all vehicle-to-vehicle communication
   Reveal Solution Discussion Select an answer first