- A
Amazon ElastiCache for Redis Global Datastore
Why wrong: In-memory cache, not a database for primary writes.
- B
Amazon RDS with Multi-AZ
Why wrong: Single-Region, not multi-master.
- C
Amazon DynamoDB Global Tables
Multi-master writes across Regions.
- D
Amazon Aurora Global Database
Why wrong: Single-master, not multi-master.
Question 98 of 1,730
Multi-Master Cross-Region Conflict Resolution: DynamoDB Global Tables
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 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?
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.
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 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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Aurora Global Database
Why it's wrong here
Single-master, not multi-master.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that 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.
Detailed technical explanation
How to think about this question
DynamoDB Global Tables use a last-writer-wins (LWW) conflict resolution mechanism based on the timestamp of the write operation, ensuring sub-second convergence across Regions. Under the hood, each Region maintains a fully writable replica, and changes are asynchronously replicated using DynamoDB Streams, with conflict resolution handled automatically by the service. In a real-world scenario, this is ideal for applications like global leaderboards or shopping carts where concurrent writes must be resolved quickly without manual intervention.
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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Workload-Specific Database Design — study guide chapter
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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 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.
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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