Hyperledger Fabric Framework and Applications in Finance BFC Practice Questions (Page 10)

Questions 46–48

1. 46expert · hard

   A consortium of banks is using Hyperledger Fabric for syndicated loans. They need to share loan terms with all banks but keep the borrower's financial details private to the lead arranger and the borrower's bank. A transaction that updates the loan terms also references the borrower's financial details. What is the best way to design this?

   • AStore loan terms on the shared ledger and borrower financial details in a private data collection accessible only to the authorized banks.
   • BEncrypt the borrower's financial details and store them on the shared ledger.
   • CCreate a separate channel for the borrower's financial details and share loan terms off-chain.
   • DStore all data on the shared ledger and rely on the endorsement policy to restrict access.
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2. 47application · medium

   A bank wants to integrate its existing core banking system with a Hyperledger Fabric network that handles trade finance. The integration should allow the core system to submit transactions and query the ledger without exposing the bank's internal network. Which approach should the bank use?

   • AExpose the Fabric peer's chaincode directly as a web service.
   • BDeploy a Fabric SDK client on a server in the bank's DMZ that connects to the Fabric network and exposes REST APIs to the core system.
   • CGive the core system direct access to the Fabric peer's gRPC endpoint.
   • DUse a database replication tool to synchronize the core system's database with the Fabric ledger.
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3. 48expert · hard

   A developer is writing a chaincode for a bond issuance platform. The chaincode must ensure that a bond can only be transferred if the current owner's digital signature is provided. The developer is considering where to enforce this check. What is the best practice?

   • AEnforce the signature check inside the chaincode by verifying the caller's identity using the transaction's creator certificate.
   • BRely on the client application to only submit transactions with the owner's signature.
   • CStore the owner's signature in a private data collection and check it off-chain.
   • DUse the ordering service to verify the owner's signature.
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