Hyperledger Fabric Framework and Applications in Finance BFC Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the role of the ordering service in Hyperledger Fabric's consensus process?

   • ATo execute chaincode and validate transactions
   • BTo store the world state of the ledger
   • CTo manage identities and certificates
   • DTo order transactions into a sequence and package them into blocks
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2. 7expert · hard

   A bank wants to integrate its existing trade finance application with Hyperledger Fabric. The application is written in COBOL and runs on a mainframe. The bank cannot modify the COBOL application. What is the most practical integration approach?

   • APort the COBOL application to Java and use the Fabric Java SDK.
   • BExpose the chaincode as a web service using a Fabric REST proxy.
   • CUse a Fabric gateway that supports COBOL directly.
   • DUse a Fabric SDK client in a middleware layer that exposes REST APIs to the COBOL application.
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4. 8application · medium

   A consortium of healthcare insurers is using Hyperledger Fabric to process claims. They need to share claim summaries with all insurers but keep the detailed medical records private to the patient's insurer. What should they implement?

   • ACreate a separate channel for each insurer and share summaries via off-chain APIs.
   • BStore all data on the shared ledger and rely on encryption.
   • CUse a private data collection to store detailed medical records, with the claim summary on the shared ledger.
   • DUse the ordering service to filter which data is sent to each peer.
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5. 9application · medium

   A consortium of five banks is setting up a Hyperledger Fabric network for real-time payment settlement. They need to choose an ordering service. The network will have a small number of orderers, and they want to avoid external dependencies. Which ordering service should they choose?

   • ARaft-based ordering, because it is crash fault tolerant, does not require external dependencies, and is easier to manage.
   • BPBFT-based ordering, because it provides Byzantine fault tolerance and is built into Fabric.
   • CKafka-based ordering, because it provides high throughput and is the default in production.
   • DSolo ordering, because it is simple and sufficient for a small consortium.
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6. 10application · medium

   A regulated financial institution is deploying Hyperledger Fabric and must comply with data protection regulations that require the ability to audit who accessed specific transaction data and when. Which Fabric feature should the institution configure to meet this requirement?

   • AEnable detailed logging on peers and client applications to record all chaincode invocations and queries.
   • BAssign all users to a single MSP to simplify identity management.
   • CConfigure the ordering service to record all transactions in the ledger.
   • DUse a private data collection to store all transaction data.
   Reveal Solution Discussion Select an answer first