CBSA Solution Architecture Design 5

Question 1

A blockchain architect is designing a decentralized identity (DID) solution. Which W3C standard defines the core data model for self-sovereign identity?

Accepted Answer

Decentralized Identifiers (DIDs) W3C specification

Answer

The W3C DID specification defines a standard data model for decentralized identifiers that are globally unique, resolvable, and cryptographically verifiable without a central registry.

Question 2

When designing a blockchain governance model, which mechanism best prevents plutocratic control (wealthy actors dominating decisions)?

Accepted Answer

Quadratic voting where cost increases with vote count

Answer

Quadratic voting makes each additional vote on the same issue progressively more expensive, reducing the outsized influence of large token holders while preserving minority voice.

Question 3

A CBSA architect is designing a blockchain solution for carbon credit trading. Which on-chain data element is most essential for preventing double-spending of credits?

Accepted Answer

A unique serial number with spent/unspent state tracking

Answer

Each carbon credit must have a unique serial number with a tracked state (issued, transferred, retired) on-chain to ensure a credit can only be used to offset emissions once.

Question 4

In a multi-party computation (MPC) wallet architecture for enterprise blockchain, what is the primary security advantage over a traditional single private key?

Accepted Answer

No single point of compromise — key shares are distributed across parties

Answer

MPC distributes key shares among multiple parties such that no single compromised party can reconstruct the private key or sign transactions unilaterally, eliminating the single point of failure.

Question 5

An architect is designing a blockchain system that must maintain high availability during a network partition. According to the CAP theorem, which two properties does a blockchain system typically prioritize?

Accepted Answer

Consistency and Partition tolerance

Answer

Most blockchain systems prioritize Consistency (all nodes see the same ledger state) and Partition tolerance (network continues operating during partitions), sacrificing some Availability during splits.

(CBSA) Certified Blockchain Solution Architect Practice Test

(CBSA) Certified Blockchain Solution Architect Practice Test

CBSA Solution Architecture Design 5