Blockchain Integration with Emerging Technologies BDC Practice Questions (Page 15)

Questions 71–73

1. 71application · medium

   A manufacturer creates a digital twin for each physical machine. They want to ensure that the twin's history (maintenance, sensor readings, ownership) is consistent and tamper-evident across multiple stakeholders. Which approach is most effective?

   • AUse a sidechain that only stores the latest state, discarding history
   • BStore the entire digital twin model on a public blockchain
   • CRecord each state change of the digital twin as a transaction on a permissioned blockchain, with hashes of sensor data
   • DUse a cloud database and rely on periodic backups to ensure consistency
   Reveal Solution Discussion Select an answer first
2. 72foundation · easy

   How can blockchain improve big data integrity?

   • ABy providing an immutable record of data changes and provenance
   • BBy compressing data to reduce storage size
   • CBy deleting old data automatically
   • DBy encrypting all data with a single key
   Reveal Solution Discussion Select an answer first
3. 73foundation · easy

   How can blockchain enhance government services like voting?

   • ABy using a centralized database to count votes
   • BBy keeping all votes secret from auditors
   • CBy allowing votes to be changed after submission
   • DBy providing a transparent and tamper-proof record of votes
   Reveal Solution Discussion Select an answer first