Hyperledger Fabric Architecture and Network Creation BDC Practice Questions (Page 8)

Questions 36–40

1. 36expert · easy

   In a Fabric network, which component is responsible for ensuring that transactions are ordered consistently across the network?

   • AThe committing peers
   • BThe endorsing peers
   • CThe client application
   • DThe ordering service
   Reveal Solution Discussion Select an answer first
2. 37expert · hard

   A Fabric network has a chaincode that is already committed on a channel. The consortium wants to update the endorsement policy from requiring endorsement from any one organization to requiring endorsement from all three organizations. The chaincode code itself does not change. What is the correct procedure?

   • AUpgrade the chaincode with a new version, specifying the new endorsement policy in the chaincode definition, and then approve and commit it.
   • BUse the peer channel update command to modify the endorsement policy in the channel configuration.
   • CUse the peer chaincode instantiate command with the new endorsement policy.
   • DEdit the chaincode source code to include the new endorsement policy and reinstall it on all peers.
   Reveal Solution Discussion Select an answer first
4. 38application · medium

   A Fabric network administrator has packaged a new chaincode and installed it on all peers of the organizations that will use it. The administrator now needs to make the chaincode available on a channel. What is the next required step in the Fabric 2.x chaincode lifecycle?

   • AApprove the chaincode definition for each organization and then commit it to the channel.
   • BUpgrade the chaincode on the channel to activate it.
   • CStart the chaincode container manually on each peer before committing.
   • DInstantiate the chaincode on the channel using the peer chaincode instantiate command.
   Reveal Solution Discussion Select an answer first
5. 39application · medium

   A developer needs to query the current balance of an asset in a Fabric network. The asset's balance has been updated multiple times. Which data source provides the most efficient and accurate current value?

   • AThe state database (world state) on any peer that has committed the relevant blocks.
   • BThe chaincode container's in-memory cache.
   • CThe blockchain ledger, by reading the latest block that contains the asset's update.
   • DThe ordering service's copy of the transaction log.
   Reveal Solution Discussion Select an answer first
6. 40foundation · easy

   Where is the endorsement policy for a chaincode defined?

   • AIn the chaincode source code
   • BIn the MSP configuration
   • CIn the chaincode definition when it is committed
   • DIn the channel configuration
   Reveal Solution Discussion Select an answer first