CorDapp Development and Lifecycle BDC Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A developer is writing a unit test for a contract's verify() method. The test creates a transaction with an input state and an output state. The developer wants to assert that the transaction is valid. Which test method should be used?

   • Acontract.verify(transaction)
   • Btransaction.verify()
   • Ctransaction.validate()
   • Dtransaction.checkValidity()
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2. 22foundation · easy

   What is the typical first step in the lifecycle of a CorDapp?

   • ADevelopment of the CorDapp code
   • BDeployment to a production network
   • CRetirement of the CorDapp
   • DUpgrade of the CorDapp
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4. 23foundation · easy

   Which interface must a custom state class implement in Corda?

   • AContractState
   • BServiceHub
   • CContract
   • DFlowLogic
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5. 24application · medium

   A developer has built a CorDapp JAR and wants to deploy it to a Corda node running in a Docker container. The node's CorDapp directory is mounted as a volume. What is the correct deployment step?

   • AUse the node's shell command 'installCorDapp' to install the JAR while the node is running.
   • BUpload the JAR to the node's HTTP API endpoint for CorDapp management.
   • CCopy the JAR into the mounted CorDapp directory and restart the node.
   • DPlace the JAR in the node's 'plugins' directory and run 'cordapp:deploy'.
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6. 25foundation · easy

   Which class is used to set up a mock network for testing CorDapp flows?

   • ANetworkMapService
   • BNodeDriver
   • CMockNetwork
   • DCordaService
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