- A
Use AWS AppConfig to create a configuration profile that references the parameter. Configure a Lambda function as a validator and deploy strategy. When the parameter changes, AppConfig triggers a deployment that updates the ECS service.
AppConfig is designed for dynamic configuration and can integrate with ECS to update containers.
- B
Use an AWS CloudFormation custom resource that updates the ECS service when the parameter changes.
Why wrong: Custom resources are for provisioning, not ongoing configuration updates.
- C
Use a CI/CD pipeline that monitors the parameter store and triggers a new build and deploy of the container image with the updated parameter.
Why wrong: This is overkill and may cause unnecessary downtime.
- D
Use Amazon EventBridge to detect changes to the parameter and invoke a Lambda function that updates the ECS task definition and forces a new deployment.
Why wrong: This adds complexity and does not leverage AppConfig's built-in features.
Quick Answer
The correct answer is to use AWS AppConfig to create a configuration profile referencing the parameter, with a Lambda validator and deploy strategy to trigger the ECS service update. This approach is correct because AppConfig natively integrates with AWS Systems Manager Parameter Store to detect parameter changes and automatically roll out validated configuration updates to ECS containers without requiring custom polling scripts or manual intervention. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of managed configuration lifecycle management versus ad-hoc solutions—a common trap is assuming CloudWatch Events can directly update ECS services, but AppConfig is the only service that handles validation, deployment strategies, and automatic rollback with minimal overhead. Remember the key distinction: AppConfig manages the *deployment* of configuration changes, while Parameter Store only stores the values. Memory tip: think "AppConfig deploys, Parameter Store stores."
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 DevOps team is designing a configuration management solution for a microservices architecture running on Amazon ECS. The team wants to ensure that container configurations are automatically updated when a new version of a parameter is stored in AWS Systems Manager Parameter Store. Which approach best meets this requirement with minimal operational overhead?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 AppConfig to create a configuration profile that references the parameter. Configure a Lambda function as a validator and deploy strategy. When the parameter changes, AppConfig triggers a deployment that updates the ECS service.
Option A is correct because using AWS AppConfig with a Lambda function to trigger an ECS service update is a native, managed solution. Option B is wrong because it does not automatically update running containers. Option C is wrong because it requires manual steps. Option D is wrong because CloudWatch Events cannot directly update ECS services.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 AppConfig to create a configuration profile that references the parameter. Configure a Lambda function as a validator and deploy strategy. When the parameter changes, AppConfig triggers a deployment that updates the ECS service.
Why this is correct
AppConfig is designed for dynamic configuration and can integrate with ECS to update containers.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Use an AWS CloudFormation custom resource that updates the ECS service when the parameter changes.
Why it's wrong here
Custom resources are for provisioning, not ongoing configuration updates.
- ✗
Use a CI/CD pipeline that monitors the parameter store and triggers a new build and deploy of the container image with the updated parameter.
Why it's wrong here
This is overkill and may cause unnecessary downtime.
- ✗
Use Amazon EventBridge to detect changes to the parameter and invoke a Lambda function that updates the ECS task definition and forces a new deployment.
Why it's wrong here
This adds complexity and does not leverage AppConfig's built-in features.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
- →
Configuration Management and IaC — study guide chapter
Learn the concepts, then practise the questions
- →
Configuration Management and IaC 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?
Configuration Management and IaC — This question tests Configuration Management and IaC — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use AWS AppConfig to create a configuration profile that references the parameter. Configure a Lambda function as a validator and deploy strategy. When the parameter changes, AppConfig triggers a deployment that updates the ECS service. — Option A is correct because using AWS AppConfig with a Lambda function to trigger an ECS service update is a native, managed solution. Option B is wrong because it does not automatically update running containers. Option C is wrong because it requires manual steps. Option D is wrong because CloudWatch Events cannot directly update ECS services.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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.