Describe considerations for working with non-relational data on Azure →hardMultiple ChoiceObjective-mapped
DP-900 Practice Question: Describe considerations for working with non-relational data on Azure
A company uses Azure Cosmos DB for a global e-commerce application. The application needs to support multi-region writes and provide strong consistency for inventory updates. Which configuration minimizes write latency while meeting the consistency requirement?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Single-region writes with strong consistency
Multi-region writes (multi-master) with strong consistency is not supported in Azure Cosmos DB. To achieve strong consistency, you must use single-region writes. Therefore, single-region writes with strong consistency (Option C) meets the requirement while minimizing write latency by avoiding the overhead of multi-region replication. Option A (multi-master with bounded staleness) provides bounded staleness, not strong consistency. Option B (single-region writes with session consistency) provides session consistency, which is weaker. Option D (multi-master with eventual consistency) provides eventual consistency, which is the weakest level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Multi-master with bounded staleness consistency
Why it's wrong here
Bounded staleness does not guarantee strong consistency, and multi-master adds latency.
- ✗
Single-region writes with session consistency
Why it's wrong here
Session consistency is weaker than strong consistency.
- ✓
Single-region writes with strong consistency
Why this is correct
Strong consistency is supported only with single-region writes; multi-region writes cannot achieve strong consistency.
- ✗
Multi-master with eventual consistency
Why it's wrong here
Eventual consistency does not meet the strong consistency requirement.
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