DBS-C01 Workload-Specific Database Design Practice Question
A company needs to implement a database solution for a global e-commerce platform that requires strongly consistent reads and writes with automatic failover across AWS Regions. Which service should be used?
⚠ Common exam trap
Test-takers frequently confuse DynamoDB global tables' eventual consistency with strong consistency, or assume Multi-AZ RDS provides cross-Region failover, when in fact Multi-AZ is limited to a single Region and cross-Region replicas require manual intervention.
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 Aurora Global Database.
Amazon Aurora Global Database is the correct choice because it provides strongly consistent reads and writes across multiple AWS Regions with automatic failover. It uses a primary cluster in one Region and up to five secondary read-only clusters in other Regions, with replication typically under one second. Failover to a secondary Region can be promoted in as little as one minute, meeting the requirements for a global e-commerce platform.
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 it's wrong here
Eventually consistent cross-Region.
- ✗
Amazon RDS for MySQL with Multi-AZ and cross-Region read replicas.
Why it's wrong here
Cross-Region replicas are for read only; failover not automatic.
- ✗
Amazon ElastiCache for Redis with Global Datastore.
Why it's wrong here
In-memory cache, not a durable database.
- ✓
Amazon Aurora Global Database.
Why this is correct
Provides cross-Region replication and failover with strong consistency.
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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.