A global e-commerce company uses Azure Cosmos DB to store its product catalog. The catalog is read-heavy, with users worldwide expecting consistent reads with a 99th percentile latency under 10 ms. Writes to the catalog are performed by a central admin team in one region. The company needs to minimize write latency and cost while ensuring that users always see the same data within a single session. Which Cosmos DB configuration should the company choose?

Single-master write region with Strong consistency and multiple read regions

Strong consistency forces all writes to be replicated synchronously across regions, increasing write latency and potentially reducing availability during outages. It is not justified here.

Multi-master write with Eventual consistency and all regions enabled for writes

Multi-master write is unnecessary because writes only come from one region. Eventual consistency may cause users to see stale data within a session, violating the requirement for session consistency.

Multi-master write with Strong consistency and two regions

This configuration would significantly increase write latency and cost. The strong consistency across multi-master writes is difficult to achieve and unnecessary given the single write location.

What does this AZ-305 question test?

Read the scenario before looking for a memorised answer.

What is the correct answer to this question?

The correct answer is: Single-master write region with Session consistency and multiple read regions — The scenario requires low-latency reads globally with a single write region (central admin) and session consistency to guarantee a consistent view within a user session. Multi-master writes add cost and complexity without benefit since writes occur only from one region. Strong consistency would increase write latency and reduce availability. Using multiple read regions with session consistency meets the performance and consistency needs cost-effectively.

What should I do if I get this AZ-305 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.