Hyperledger Fabric Framework and Applications in Finance BFC Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A bank is using Hyperledger Fabric for trade finance. They want to provide a letter of credit to a supplier, but the supplier's bank is not a member of the same channel. What is the best way to involve the supplier's bank?

   • AUse a private data collection to share the letter of credit with the supplier's bank without adding them to the channel.
   • BSend the letter of credit details via email and record a hash on the existing channel.
   • CAdd the supplier's bank to the existing channel by updating the channel configuration.
   • DCreate a new channel that includes the supplier's bank and the relevant parties, and deploy the letter of credit chaincode on that channel.
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2. 27foundation · easy

   Which consensus mechanism is commonly used in Hyperledger Fabric for ordering services in production networks?

   • ARaft
   • BProof of Stake
   • CProof of Work
   • DDelegated Proof of Stake
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4. 28application · medium

   A developer is writing chaincode for a Hyperledger Fabric network that manages asset transfers. The chaincode must ensure that an asset cannot be transferred to a non-existent account. Where should this validation logic be implemented?

   • AIn the chaincode, by checking that the recipient account exists before updating the asset owner.
   • BIn the ordering service, by checking the transaction content before adding it to a block.
   • CIn the client application, by validating the recipient account before submitting the transaction.
   • DIn the channel configuration, by defining a policy that rejects transfers to non-existent accounts.
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5. 29application · medium

   A Hyperledger Fabric network has multiple organizations, each running peers. One organization's peer goes offline for maintenance. What is the impact on the network's ability to process transactions?

   • AThe orderer will stop ordering transactions until the peer is back online.
   • BThe entire network stops processing transactions until the peer comes back online.
   • COnly transactions that involve that organization's assets are affected.
   • DTransactions can still be processed as long as the endorsement policy is satisfied by the remaining peers.
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6. 30application · medium

   A Hyperledger Fabric network is experiencing slow transaction throughput. The admin notices that the endorsement policy requires endorsement from all peers in the organization, and the chaincode is invoked frequently. Which change is most likely to improve performance?

   • AChange the endorsement policy to require endorsement from only a subset of peers, such as one peer per organization.
   • BMove all peers to a single data center to reduce latency.
   • CUse a Kafka-based ordering service instead of Raft.
   • DIncrease the number of orderers in the Raft cluster.
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