CBSA Solution Deployment & Integration 5

Question 1

A blockchain architect must design a rollback strategy for a failed chaincode upgrade. What is the correct approach in Hyperledger Fabric?

Accepted Answer

Re-deploy the previous approved chaincode version using the lifecycle endorsement process

Answer

Hyperledger Fabric's chaincode lifecycle allows a previous approved and committed chaincode version to be re-instantiated without altering the immutable ledger history.

Question 2

When integrating a blockchain solution with an enterprise message broker (e.g., Apache Kafka), what is the primary architectural benefit?

Accepted Answer

Kafka decouples blockchain event producers from consumers, enabling scalable, fault-tolerant event-driven integration

Answer

Using Kafka as a message broker decouples blockchain event emission from downstream consumers, enabling independent scaling, replay, and fault tolerance.

Question 3

A Hyperledger Fabric deployment uses private data collections. What is their primary purpose in a multi-organization channel?

Accepted Answer

To allow a subset of organizations to share confidential data without exposing it to the full channel

Answer

Private data collections allow a defined subset of channel members to store and access sensitive data off-chain while only a hash is recorded on the shared ledger.

Question 4

During integration testing of a blockchain solution, a team uses Hyperledger Fabric's test network. Which statement about this environment is correct?

Accepted Answer

The test network uses a pre-configured CA, orderer, and peers suitable for development and integration testing only

Answer

Fabric's test network provides a minimal pre-configured network for development and integration testing and is explicitly not intended for production use.

Question 5

A blockchain architect needs to ensure that a deployed Ethereum smart contract handles failed external calls safely. Which Solidity pattern prevents a single failed call from reverting all state changes?

Accepted Answer

Implementing the pull-over-push payment pattern to let recipients withdraw funds independently

Answer

The pull pattern shifts fund withdrawal responsibility to recipients, so one recipient's failed receive function cannot block or revert other participants' state changes.

(CBSA) Certified Blockchain Solution Architect Practice Test

(CBSA) Certified Blockchain Solution Architect Practice Test

CBSA Solution Deployment & Integration 5