Quick Answer
Amazon Aurora Global Database is the correct choice because it delivers a global database with strong consistency and automatic failover across AWS Regions, meeting the exact requirements for a globally distributed e-commerce platform. The service achieves this through a primary cluster in one Region that synchronously replicates writes to up to five secondary read-only clusters in other Regions, with replication lag typically under one second, ensuring strongly consistent reads and writes even during cross-Region operations. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your ability to distinguish between services that offer eventual consistency versus strong consistency in a global context—a common trap is confusing DynamoDB Global Tables (which provides eventual consistency) with Aurora Global Database. Remember that Aurora’s storage-based replication guarantees read-after-write consistency across Regions, while failover to a secondary Region can be promoted in as little as one minute. Memory tip: think “Aurora = Always Consistent, Automatic Failover” to avoid picking DynamoDB for strongly consistent global workloads.
This DBS-C01 practice question tests your understanding of workload-specific database design. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
Amazon DynamoDB global tables.
Why wrong: Eventually consistent cross-Region.
Amazon RDS for MySQL with Multi-AZ and cross-Region read replicas.
Why wrong: Cross-Region replicas are for read only; failover not automatic.
Amazon ElastiCache for Redis with Global Datastore.
Why wrong: In-memory cache, not a durable database.
Amazon Aurora Global Database.
Provides cross-Region replication and failover with strong consistency.
Answer choices
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often 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.
Detailed technical explanation
Aurora Global Database leverages a dedicated replication channel using the Aurora storage layer's log-based replication, which avoids the overhead of binary log (binlog) replication used by standard MySQL. The primary cluster writes to a shared storage volume, and secondary Regions replay redo logs asynchronously, ensuring data durability with minimal latency. In a real-world scenario, if the primary Region fails, you can promote a secondary Region to full read/write capability using the Failover Global Database operation, which typically completes within one minute.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
The correct answer is: 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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