CDO System Architecture & Design 2

Question 1

A CDO wants business domains to own, publish, and serve their data as products while a central team provides self-serve platform tooling. Which architecture pattern does this describe?

Accepted Answer

Data mesh

Answer

Data mesh decentralizes data ownership to domains, treats data as a product, and relies on a self-serve platform with federated governance.

Question 2

Under the CAP theorem, what must a distributed data store give up during a network partition if it chooses to remain available?

Accepted Answer

Strong consistency

Answer

During a partition, a system can guarantee only consistency or availability, so an available system accepts possibly stale reads.

Question 3

Which pattern separates the model used to update data from the model used to read it, so each side can be optimized and scaled on its own?

Accepted Answer

CQRS

Answer

Command Query Responsibility Segregation (CQRS) uses separate write and read models, often linked by events.

Question 4

In a microservices architecture, what is the recommended data ownership principle?

Accepted Answer

Each service owns its data and exposes it only through its API or events

Answer

Database-per-service keeps services loosely coupled, and other services reach the data only through contracts.

Question 5

An event consumer may receive the same message more than once from a message broker. Which design property keeps duplicate processing from corrupting data?

Accepted Answer

Idempotency

Answer

An idempotent operation gives the same result no matter how many times it runs, so at-least-once delivery is safe.

CDO - Chief Data Officer Certification Practice Test

CDO - Chief Data Officer Certification Practice Test

CDO System Architecture & Design 2