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Question 325 of 1,740

Configuration Management and IaC →hardMultiple ChoiceObjective-mapped

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.

Question 1hardmultiple choice

Full question →

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.

Full breakdown with real-world context →

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.

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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?

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.

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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.