CDS Architecture & System Design 2

Question 1

Which architectural pattern separates read and write operations into distinct models to optimize scalability?

Accepted Answer

CQRS (Command Query Responsibility Segregation)

Answer

CQRS splits the data model into separate command (write) and query (read) sides, allowing each to be scaled and optimized independently.

Question 2

In a federated data architecture, what is the primary responsibility of a data domain owner?

Accepted Answer

Owning, publishing, and maintaining data products for their domain

Answer

In a federated (data mesh) architecture, domain owners are responsible for treating their data as a product and maintaining its quality and availability.

Question 3

What does a 'data contract' define in a modern data architecture?

Accepted Answer

The SLA between a data producer and its consumers regarding schema, quality, and delivery

Answer

A data contract is a formal agreement between producer and consumer specifying schema, semantics, quality expectations, and delivery guarantees.

Question 4

Which type of data store is BEST suited for managing highly connected entity relationships, such as social networks or fraud detection graphs?

Accepted Answer

Graph database

Answer

Graph databases natively store nodes and edges, making traversal of complex relationships far more efficient than joins in relational systems.

Question 5

A 'schema-on-read' approach, common in data lakes, means:

Accepted Answer

The schema is applied and interpreted when data is queried

Answer

Schema-on-read defers schema enforcement to query time, allowing raw data to be stored flexibly and interpreted differently by each consumer.

(CDS) Certified Data Steward Practice Test

(CDS) Certified Data Steward Practice Test

CDS Architecture & System Design 2