- A
Use AWS CloudFormation StackSets to deploy the ECS services and supporting resources in the DR region. Configure an Aurora Global Database for cross-region replication. Use Amazon Route 53 with health checks and failover routing to automatically redirect traffic to the DR region when the primary region health check fails.
StackSets automates infrastructure deployment, Aurora Global Database provides low RPO, and Route 53 failover routing provides automatic DNS failover within minutes.
- B
Take daily snapshots of the Aurora database and copy them to the DR region. In the event of a disaster, restore the snapshot and use AWS CloudFormation to launch the ECS services.
Why wrong: Daily snapshots exceed RPO of 15 minutes, and restoring takes longer than 30 minutes.
- C
Use AWS Backup to schedule cross-region backups of the Aurora database every 15 minutes. In the event of a disaster, restore the latest backup and use Elastic Beanstalk to deploy the application in the DR region.
Why wrong: Backup frequency may meet RPO, but restore time and Elastic Beanstalk deployment may exceed RTO.
- D
Configure AWS Global Accelerator with an endpoint group in each region. Use AWS Lambda to periodically check the health of the primary region and update the DNS records manually to point to the DR region.
Why wrong: Manual DNS update is too slow; Global Accelerator does not automatically failover based on application health.
Quick Answer
The correct answer is to use AWS CloudFormation StackSets to deploy the ECS services and supporting resources in the DR region, combined with Amazon Route 53 health checks and failover routing, while relying on an Aurora Global Database for cross-region replication. This solution meets the 30-minute RTO because StackSets ensure infrastructure is pre-provisioned and ready in us-west-2, and Route 53’s DNS-based failover instantly redirects traffic when the primary health check fails, eliminating manual intervention. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of automating multi-region DR for stateless compute (Fargate) and stateful storage (Aurora) with strict RTO/RPO constraints—a common trap is choosing snapshot restore, which is too slow for a 15-minute RPO, or manual runbooks that cannot meet the 30-minute RTO. Remember the key pairing: StackSets for infrastructure as code across regions plus Route 53 for automated traffic steering, with Aurora Global Database handling the replication. Memory tip: “StackSets set the stage, Route 53 flips the page.”
DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 financial services company runs a critical application on Amazon ECS with Fargate launch type. The application consists of three microservices: Service A (frontend), Service B (processing), and Service C (database access). Services communicate via REST APIs. The application stores data in Amazon Aurora PostgreSQL Serverless v2. The company has a disaster recovery (DR) requirement: RTO of 30 minutes and RPO of 15 minutes. The primary region is us-east-1 and the DR region is us-west-2. The DevOps team has configured cross-region replication for the Aurora database using an Aurora Global Database. The ECS services are deployed with a service-linked role for Fargate. The team wants to automate the failover process to meet the RTO. Which solution should the team implement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
Use AWS CloudFormation StackSets to deploy the ECS services and supporting resources in the DR region. Configure an Aurora Global Database for cross-region replication. Use Amazon Route 53 with health checks and failover routing to automatically redirect traffic to the DR region when the primary region health check fails.
Option A is correct because using CloudFormation StackSets to deploy the infrastructure in both regions and using Route 53 with health checks and failover routing allows automated failover with DNS propagation. The Aurora Global Database provides managed replication. Option B (snapshot restore) is too slow. Option C (manual runbooks) won't meet RTO. Option D (ECS Service Auto Scaling across regions) is not directly possible with Fargate cross-region.
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.
- ✓
Use AWS CloudFormation StackSets to deploy the ECS services and supporting resources in the DR region. Configure an Aurora Global Database for cross-region replication. Use Amazon Route 53 with health checks and failover routing to automatically redirect traffic to the DR region when the primary region health check fails.
Why this is correct
StackSets automates infrastructure deployment, Aurora Global Database provides low RPO, and Route 53 failover routing provides automatic DNS failover within minutes.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Take daily snapshots of the Aurora database and copy them to the DR region. In the event of a disaster, restore the snapshot and use AWS CloudFormation to launch the ECS services.
Why it's wrong here
Daily snapshots exceed RPO of 15 minutes, and restoring takes longer than 30 minutes.
- ✗
Use AWS Backup to schedule cross-region backups of the Aurora database every 15 minutes. In the event of a disaster, restore the latest backup and use Elastic Beanstalk to deploy the application in the DR region.
Why it's wrong here
Backup frequency may meet RPO, but restore time and Elastic Beanstalk deployment may exceed RTO.
- ✗
Configure AWS Global Accelerator with an endpoint group in each region. Use AWS Lambda to periodically check the health of the primary region and update the DNS records manually to point to the DR region.
Why it's wrong here
Manual DNS update is too slow; Global Accelerator does not automatically failover based on application health.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
- →
Resilient Cloud Solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Resilient Cloud Solutions practice questions
Targeted practice on this topic area only
- →
All DOP-C02 questions
1,740 questions across all exam domains
- →
AWS Certified DevOps Engineer Professional DOP-C02 study guide
Full concept coverage aligned to exam objectives
- →
DOP-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DOP-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Configuration Management and IaC practice questions
Practise DOP-C02 questions linked to Configuration Management and IaC.
Resilient Cloud Solutions practice questions
Practise DOP-C02 questions linked to Resilient Cloud Solutions.
Monitoring and Logging practice questions
Practise DOP-C02 questions linked to Monitoring and Logging.
Incident and Event Response practice questions
Practise DOP-C02 questions linked to Incident and Event Response.
Security and Compliance practice questions
Practise DOP-C02 questions linked to Security and Compliance.
SDLC Automation practice questions
Practise DOP-C02 questions linked to SDLC Automation.
DOP-C02 fundamentals practice questions
Practise DOP-C02 questions linked to DOP-C02 fundamentals.
DOP-C02 scenario practice questions
Practise DOP-C02 questions linked to DOP-C02 scenario.
DOP-C02 troubleshooting practice questions
Practise DOP-C02 questions linked to DOP-C02 troubleshooting.
Practice this exam
Start a free DOP-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: Use AWS CloudFormation StackSets to deploy the ECS services and supporting resources in the DR region. Configure an Aurora Global Database for cross-region replication. Use Amazon Route 53 with health checks and failover routing to automatically redirect traffic to the DR region when the primary region health check fails. — Option A is correct because using CloudFormation StackSets to deploy the infrastructure in both regions and using Route 53 with health checks and failover routing allows automated failover with DNS propagation. The Aurora Global Database provides managed replication. Option B (snapshot restore) is too slow. Option C (manual runbooks) won't meet RTO. Option D (ECS Service Auto Scaling across regions) is not directly possible with Fargate cross-region.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 20, 2026
This DOP-C02 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 DOP-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.