Solution Architecture Design Flashcards

A blockchain architect is designing a supply chain solution where multiple competing companies must share data. Which architecture pattern best preserves data confidentiality between competitors?

Answer: Consortium blockchain with private channels

Consortium blockchains with private channels (like Hyperledger Fabric's channels) allow competing organizations to share a network while keeping sensitive data visible only to authorized parties.

When designing a blockchain solution for high-frequency trading, which factor most critically impacts transaction finality?

Answer: Consensus mechanism latency

Consensus mechanism latency directly determines how quickly a transaction achieves finality; PoW can take minutes while BFT-based consensus can achieve finality in seconds.

An architect needs to design a blockchain solution that stores medical records. The solution must comply with HIPAA's right-to-erasure provisions. What is the recommended approach?

Answer: Store PII off-chain with only hashes on-chain

Storing personally identifiable information off-chain with only cryptographic hashes on-chain allows deletion of sensitive data while preserving the integrity proof on the immutable ledger.

Which design pattern is most appropriate when a blockchain solution needs to integrate with multiple legacy enterprise systems that use different data formats?

Answer: Oracle network with data transformation layer

An oracle network with a data transformation layer acts as a bridge that translates heterogeneous legacy data formats into a canonical format before writing to the blockchain.

A CBSA candidate is evaluating blockchain platforms for a solution requiring 10,000+ TPS with sub-second finality. Which platform architecture best fits this requirement?

Answer: Algorand or similar pure PoS with pipelined consensus

Pure Proof-of-Stake platforms with pipelined consensus (like Algorand) are designed to achieve thousands of TPS with near-instant finality without off-chain layer-2 solutions.

In a multi-cloud blockchain deployment, which architectural consideration is most critical for ensuring node synchronization consistency?

Answer: Network latency and clock synchronization across regions

Network latency and clock synchronization (NTP/PTP) are critical because consensus protocols rely on message ordering and timing; inconsistencies cause forks or failed consensus rounds.

What is the primary architectural advantage of using a state channel pattern in a blockchain solution?

Answer: Enables off-chain transactions with on-chain settlement

State channels allow parties to conduct numerous transactions off-chain at high speed and low cost, only settling the final state on-chain, dramatically improving throughput and reducing fees.