CBSA Enterprise Blockchain Platforms 5

Question 1

What is the role of the 'world state' database in Hyperledger Fabric?

Accepted Answer

It stores the current value of all ledger keys for efficient query access

Answer

The world state database (typically CouchDB or LevelDB) stores the latest value of each key, allowing chaincode to efficiently read current state without replaying the entire transaction history.

Question 2

A CBSA candidate is evaluating enterprise platforms. Which statement about Hyperledger Sawtooth's architecture is accurate?

Accepted Answer

Sawtooth supports pluggable consensus and uses Transaction Families instead of general smart contracts

Answer

Hyperledger Sawtooth features pluggable consensus algorithms (including PoET) and uses Transaction Families — modular code packages — to define transaction processing rules.

Question 3

In the context of enterprise blockchain interoperability, what does Hyperledger Cactus provide?

Accepted Answer

A framework enabling integration and interoperability between different blockchain networks

Answer

Hyperledger Cactus is an open-source framework that provides pluggable connectors and APIs to achieve interoperability between different distributed ledger technologies.

Question 4

Which scenario best illustrates the need for a 'notary cluster' in R3 Corda?

Accepted Answer

When preventing double-spending of states across multiple transactions

Answer

In Corda, notary clusters validate the uniqueness of input states in transactions, preventing double-spending by ensuring the same state cannot be consumed twice.

Question 5

An enterprise architect must choose between LevelDB and CouchDB as the state database for a Hyperledger Fabric network that requires complex queries on chaincode data. Which should they choose and why?

Accepted Answer

CouchDB, because it supports rich JSON document queries and indexes

Answer

CouchDB supports rich JSON-based queries and indexes, making it the appropriate choice when chaincode needs to perform complex, ad-hoc queries against world state data.

(CBSA) Certified Blockchain Solution Architect Practice Test

(CBSA) Certified Blockchain Solution Architect Practice Test

CBSA Enterprise Blockchain Platforms 5