DBS-C01 Workload-Specific Database Design Practice Question
A company is designing a database for a global e-commerce platform that requires low-latency reads and writes from multiple AWS regions. The data must be strongly consistent within a region but can be eventually consistent across regions. Which TWO services should the company consider?
⚠ Common exam trap
The key trap is that both Amazon DynamoDB Global Tables and Amazon Aurora Global Database meet the stated requirements, but they do so in different ways. Candidates might incorrectly think that only one of them is suitable, or they might confuse the active-active multi-region writes of DynamoDB Global Tables with the single-primary but globally distributed reads of Aurora Global Database. Another common mistake is selecting Amazon ElastiCache Global Datastore (a cache, not a durable database) or Amazon RDS Cross-Region Read Replicas (which only support read replicas, not writes in multiple regions).
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 correct because it provides a fully managed, multi-region, multi-active database solution that delivers low-latency reads and writes to globally distributed applications. It uses DynamoDB Streams to replicate data across regions with eventual consistency, meeting the requirement for strong consistency within a region and eventual consistency across regions.
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 DynamoDB Global Tables
Why this is correct
Provides multi-region, multi-master replication.
- ✗
Amazon ElastiCache for Redis Global Datastore
Why it's wrong here
Cache layer, not primary database.
- ✗
Amazon RDS Cross-Region Read Replicas
Why it's wrong here
Read-only replicas, not write-capable in other regions.
- ✗
Amazon Redshift
Why it's wrong here
Not designed for multi-region active-active.
- ✓
Amazon Aurora Global Database
Why this is correct
Supports cross-region replication with low-latency reads.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.