The answer is DynamoDB global tables. This is the correct choice because global tables provide multi-region, multi-active replication, enabling the application to withstand an entire AWS Region failure while maintaining single-digit millisecond read and write latency in each region. The feature uses DynamoDB Streams to capture item-level changes and a last-writer-wins conflict resolution mechanism to synchronize data across regions automatically. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of cross-region resilience patterns versus single-region solutions like DynamoDB Accelerator or point-in-time recovery, which do not offer multi-region failover. A common trap is confusing global tables with cross-region read replicas—remember that global tables are multi-active (writes allowed in all regions), not just read replicas. Memory tip: think “global” for multi-region writes and resilience, “local” for single-region performance.
DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. 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 uses Amazon DynamoDB as the database for a mobile application. The application requires single-digit millisecond read and write latency and must be resilient to the failure of an entire AWS Region. Which DynamoDB feature should the company use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DynamoDB global tables
DynamoDB global tables provide multi-Region, multi-active replication, ensuring the application can withstand an entire AWS Region failure while maintaining single-digit millisecond read and write latency in each Region. This is achieved through DynamoDB Streams and a last-writer-wins conflict resolution mechanism, making it the correct choice for cross-Region resilience.
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.
✗
DynamoDB point-in-time recovery (PITR)
Why it's wrong here
PITR enables restoring to a point in time within a Region, not automatic cross-Region failover.
✓
DynamoDB global tables
Why this is correct
Global tables replicate data across Regions, providing low latency and resilience to Region failures.
Related concept
Read the scenario before looking for a memorised answer.
✗
DynamoDB Accelerator (DAX)
Why it's wrong here
DAX is a caching layer within a Region, not a cross-Region DR solution.
✗
DynamoDB on-demand capacity mode
Why it's wrong here
On-demand handles throughput scaling, not Region failure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse high-availability features like DAX (caching) or PITR (backup) with true disaster recovery and multi-Region resilience, failing to recognize that only global tables replicate data across Regions for active-active failover.
Detailed technical explanation
How to think about this question
Global tables use DynamoDB Streams to capture item-level changes in each replica table and asynchronously replicate them to other Regions, with a last-writer-wins conflict resolution based on the timestamp of the update. This enables active-active configurations where applications can read and write to any replica, but it introduces eventual consistency for cross-Region reads and writes, which must be accounted for in application design. In real-world scenarios, global tables are critical for applications like gaming leaderboards or IoT backends that require low-latency access globally and must survive a Region outage without manual failover.
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.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: DynamoDB global tables — DynamoDB global tables provide multi-Region, multi-active replication, ensuring the application can withstand an entire AWS Region failure while maintaining single-digit millisecond read and write latency in each Region. This is achieved through DynamoDB Streams and a last-writer-wins conflict resolution mechanism, making it the correct choice for cross-Region resilience.
What should I do if I get this DOP-C02 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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Question Discussion
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