Enterprise Blockchain Platforms and Frameworks BBLC Practice Questions (Page 7)

Questions 31–35

1. 31application · medium

   A retail company is implementing Hyperledger Fabric to track product provenance. The company has an existing ERP system that manages inventory and supplier data. The team needs to ensure that the blockchain records are updated when the ERP system creates a new purchase order. Which integration strategy is most effective?

   • AModify the ERP system to directly write to the blockchain database
   • BUse a middleware service that listens for ERP events and invokes the appropriate chaincode to record the purchase order on the blockchain
   • CManually export ERP data and import it into the blockchain periodically
   • DReplace the ERP system with a blockchain-based solution
   Reveal Solution Discussion Select an answer first
2. 32application · medium

   A consortium of banks is deploying Quorum for a cross-border payment network. The network must support high transaction throughput and tolerate up to one-third of nodes being malicious. The team is deciding between Istanbul BFT and Raft consensus. Which factor is most important for this decision?

   • ARaft is the only consensus mechanism that supports private transactions in Quorum
   • BIstanbul BFT requires a central authority to manage the validator set
   • CIstanbul BFT provides Byzantine fault tolerance, which is essential when some nodes may act maliciously
   • DRaft provides better throughput than Istanbul BFT in all scenarios
   Reveal Solution Discussion Select an answer first
4. 33foundation · easy

   In R3 Corda, what is the role of a notary service?

   • ATo store the entire ledger
   • BTo issue digital identities
   • CTo execute smart contract code
   • DTo provide uniqueness consensus and prevent double-spending
   Reveal Solution Discussion Select an answer first
5. 34foundation · easy

   In Hyperledger Fabric, what is the role of chaincode?

   • AIt defines the business logic and rules for transactions
   • BIt manages the network's consensus algorithm
   • CIt issues digital certificates to participants
   • DIt stores the ledger data
   Reveal Solution Discussion Select an answer first
6. 35application · medium

   A logistics company is deploying Hyperledger Fabric to track shipments. They already have an ERP system that records shipment status. They want the blockchain to record a hash of each shipment event while keeping the full data in the ERP. What integration pattern should they use?

   • AUse an off-chain data store and store only hashes on the blockchain
   • BReplace the ERP with a smart contract system
   • CUse a middleware to synchronize the ERP database with the blockchain in real time
   • DMigrate all ERP data to the blockchain
   Reveal Solution Discussion Select an answer first