- A
Amazon DynamoDB Global Tables
Provides multi-region, multi-master replication.
- B
Amazon ElastiCache for Redis Global Datastore
Why wrong: Cache layer, not primary database.
- C
Amazon RDS Cross-Region Read Replicas
Why wrong: Read-only replicas, not write-capable in other regions.
- D
Amazon Redshift
Why wrong: Not designed for multi-region active-active.
- E
Amazon Aurora Global Database
Supports cross-region replication with low-latency reads.
Question 234 of 1,730
Achieving Eventual Consistency Across Regions with DynamoDB and Aurora
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 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?
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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).
Detailed technical explanation
How to think about this question
DynamoDB Global Tables replicate data across regions using DynamoDB Streams, which capture item-level changes and propagate them asynchronously, typically within seconds. Under the hood, each region maintains its own replica table, and conflict resolution uses a 'last writer wins' algorithm based on timestamps. In a real-world scenario, a user in Europe updating their cart and a user in Asia viewing inventory would both experience single-digit millisecond latencies because each write is processed locally before being replicated.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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
Questions learners often ask
What does this DBS-C01 question test?
Workload-Specific Database Design — This question tests Workload-Specific Database Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 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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