R3 Corda Architecture and Network Design BDC Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A Corda node operator notices that a node's vault does not contain a transaction that was recorded on the ledger. The transaction was part of a flow that completed successfully. What is the most likely reason?

   • AThe transaction was not relevant to this node's state, so it was not recorded in the vault.
   • BThe node's P2P messaging service failed to receive the transaction.
   • CThe flow framework did not persist the transaction to the database.
   • DThe notary did not record the transaction in the vault.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A developer wants to test a CorDapp with multiple nodes on a single machine without setting up a full network. Which option is most appropriate?

   • AUse the Corda Network Builder to create a local test network.
   • BRun a single node with multiple identities.
   • CUse the Corda Testnet with a single node.
   • DDeploy a production network with multiple nodes.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A consortium is planning a Corda network for a pilot with three banks. They want to test the network with real data but do not want to incur the overhead of a full production network. Which deployment type is most appropriate?

   • AA production network with a highly available notary and strict permissioning.
   • BA standalone node with no network map or notary.
   • CA test network using the Corda Testnet or a private test network with a test notary.
   • DA business network on a cloud provider with a shared notary and network map.
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A Corda network operator is designing a network for a global trade application with nodes in multiple countries. The application requires low latency for transactions, but the operator is concerned about the availability of the notary. Which notary configuration best addresses both low latency and high availability?

   • AA non-validating notary with a single node
   • BA notary cluster with nodes in multiple regions
   • CA validating notary with a single node
   • DA single notary located in a central region
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A Corda network is being designed for a healthcare consortium. They need to ensure that patient data is not stored on nodes that are not involved in a transaction, and they need to comply with data residency regulations that require data to remain in a specific country. Which design decision is most critical?

   • AEnsure that all nodes participating in transactions are located in the required country.
   • BConfigure all nodes to store all transactions in their vaults.
   • CUse a single notary located in the required country.
   • DUse a permissioning service that restricts node registration to the required country.
   Reveal Solution Discussion Select an answer first