DBS-C01 Workload-Specific Database Design Practice Question
A company is designing a global application that requires a database with multi-master writes across multiple AWS Regions with sub-second conflict resolution. Which AWS database service should they choose?
⚠ Common exam trap
Watch out — candidates often confuse Amazon Aurora Global Database's cross-Region replication with multi-master capability, but it is actually an active-passive setup with a single primary writer, not multi-master writes with sub-second conflict resolution.
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
✓
Amazon DynamoDB Global Tables
Amazon DynamoDB Global Tables is the correct choice because it provides a fully managed, multi-Region, multi-master database that replicates data across AWS Regions with sub-second conflict resolution using last-writer-wins (LWW) or application-defined conflict resolution. This meets the requirement for multi-master writes and sub-second conflict resolution, which is not achievable with the other options.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon ElastiCache for Redis Global Datastore
Why it's wrong here
In-memory cache, not a database for primary writes.
- ✗
Amazon RDS with Multi-AZ
Why it's wrong here
Single-Region, not multi-master.
- ✓
Amazon DynamoDB Global Tables
Why this is correct
Multi-master writes across Regions.
- ✗
Amazon Aurora Global Database
Why it's wrong here
Single-master, not multi-master.
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