CBSA Blockchain Network Architectures 3

Question 1

What is the primary function of a 'relay chain' in the Polkadot network architecture?

Accepted Answer

To provide shared security and interoperability between parachains

Answer

Polkadot's relay chain coordinates consensus and cross-chain communication, providing shared security to all connected parachains.

Question 2

Which factor primarily determines the 'finality' time in a blockchain network?

Accepted Answer

The consensus mechanism and number of confirmations required

Answer

Finality time depends on the consensus algorithm (e.g., PoW requires multiple confirmations while BFT-based systems offer instant finality) and the required confirmation depth.

Question 3

In a hybrid blockchain architecture, private transactions are typically handled by:

Accepted Answer

Off-chain databases with on-chain hash anchoring

Answer

Hybrid architectures often store sensitive data off-chain while anchoring cryptographic hashes on the public chain to ensure integrity without exposing private information.

Question 4

What does 'sharding' accomplish in a blockchain network architecture?

Accepted Answer

It divides the network into smaller partitions that process transactions in parallel

Answer

Sharding partitions the blockchain network into smaller groups (shards) that process transactions concurrently, dramatically increasing overall throughput.

Question 5

A blockchain architect needs nodes in different organizations to see only their relevant transaction data. Which Hyperledger Fabric feature addresses this?

Accepted Answer

Private data collections (PDC)

Answer

Private Data Collections in Hyperledger Fabric allow subsets of channel members to keep specific transaction data private, sharing only a hash on the public ledger.

(CBSA) Certified Blockchain Solution Architect Practice Test

(CBSA) Certified Blockchain Solution Architect Practice Test

CBSA Blockchain Network Architectures 3