Hyperledger Fabric Architecture and Network Creation BDC Practice Questions (Page 10)

Questions 46–50

1. 46application · medium

   A supply-chain consortium runs a Hyperledger Fabric network with three organizations. The endorsement policy for the 'shipment' chaincode requires endorsement from at least two of the three organizations. A client application submits a transaction proposal to a peer from Org1. The peer executes the chaincode and returns a signed endorsement. What must happen before the transaction can be committed to the ledger?

   • AThe client must submit the proposal to the ordering service first, which will then request endorsements from the required organizations.
   • BThe endorsing peer from Org1 must broadcast the endorsed proposal directly to all other peers for validation and commit.
   • CThe client must collect endorsements from peers of at least one other organization and submit the endorsed proposal to the ordering service.
   • DThe endorsing peer must validate the transaction against the world state and then commit it locally before any other step.
   Reveal Solution Discussion Select an answer first
2. 47application · medium

   An administrator has created a new channel and wants to add a peer from Org1 to it. The peer is already running and has the appropriate MSP certificates. Which command sequence is required?

   • ARestart the peer with the channel name as an environment variable.
   • BUse the peer channel update command to add the peer to the channel.
   • CFetch the genesis block of the channel and then join the peer to the channel using that block.
   • DUse the peer channel create command with the channel name and then the peer channel join command.
   Reveal Solution Discussion Select an answer first
4. 48application · medium

   A developer needs to implement a business rule that updates the ownership of a digital asset only if the current owner matches a specified value. Where should this logic be implemented?

   • AIn the channel configuration, by setting a rule for asset transfers.
   • BIn the ordering service, by inspecting the transaction payload.
   • CIn the chaincode, using the state database to read the current owner and validate the condition.
   • DIn the client application, by checking the owner before sending the transaction.
   Reveal Solution Discussion Select an answer first
5. 49foundation · easy

   In Hyperledger Fabric, what is created when a new channel is formed?

   • AA new chaincode container
   • BA new certificate authority
   • CA new ordering service
   • DA separate ledger and a separate world state
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6. 50foundation · easy

   Which type of peer in Hyperledger Fabric is responsible for endorsing transactions by executing chaincode?

   • AAnchor peer
   • BOrdering peer
   • CCommitting peer
   • DEndorsing peer
   Reveal Solution Discussion Select an answer first