Enterprise Blockchain Platforms and Frameworks BBLC Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A company is integrating Hyperledger Fabric with its existing SAP ERP. They need to record purchase order events on the blockchain but also need to maintain a single source of truth in SAP. They are concerned about data duplication and reconciliation. What is the best integration approach?

   • AUse a smart contract to query SAP directly for every transaction
   • BUse a middleware that listens to SAP events, computes a hash, and writes the hash to the blockchain
   • CReplace SAP with a blockchain-based ERP system
   • DWrite all purchase order data directly to the blockchain and use SAP as a backup
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Why is interoperability important among enterprise blockchain platforms?

   • AIt makes the blockchain immutable
   • BIt increases the mining difficulty
   • CIt allows different blockchain networks to share data and transact across platforms
   • DIt reduces the need for consensus
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A Corda network is experiencing a dispute over a transaction where a party claims that a state was consumed twice. The network uses a single notary service. The team is investigating the issue. What is the most likely cause of the double-spend?

   • AThe notary service failed to check the uniqueness of the state before committing the transaction
   • BThe transaction was not signed by all required parties
   • CThe contract validation logic was not executed by the parties involved
   • DThe notary service was not configured to store transaction data
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A developer is building a CorDapp for a supply-chain finance platform. The app needs to model a 'PurchaseOrder' state that is created by a buyer and sent to a seller for approval. The developer must ensure that the state transitions are validated and that the workflow is automated. Which CorDapp component is responsible for defining the rules that govern how the 'PurchaseOrder' state can be created and updated?

   • AThe notary service that checks the uniqueness of the state
   • BThe contract class that defines the validation rules for the state
   • CThe state itself, which contains the data and the list of participants
   • DThe flow that orchestrates the steps of the transaction between buyer and seller
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   In a Corda CorDapp, what is the role of a state?

   • AIt represents a shared fact on the ledger that is immutable and can be consumed by transactions
   • BIt defines the business logic for transactions
   • CIt stores the private keys of participants
   • DIt manages the network's consensus
   Reveal Solution Discussion Select an answer first