- 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.
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 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?
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.
AWS AppConfig is purpose-built for managing application configuration and supports automatic deployment of configuration changes to ECS services when a parameter in Systems Manager Parameter Store is updated. By creating a configuration profile that references the parameter, AppConfig can trigger a deployment that updates the ECS service without requiring custom code or manual intervention, minimizing operational overhead.
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 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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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: answer the scenario, not the keyword
The trap here is that candidates may assume EventBridge with Lambda (Option D) is the simplest solution, but they overlook that AppConfig provides a managed, lower-overhead alternative specifically designed for configuration management and automatic deployment to ECS.
Detailed technical explanation
How to think about this question
AWS AppConfig uses a hosted configuration store or references to Parameter Store or S3, and it supports deployment strategies like linear, canary, or all-at-once to control the rollout of configuration changes. When a parameter changes, AppConfig can automatically start a deployment based on a configured trigger, and it integrates with ECS to update the service's task definition with the new configuration without requiring a full container image rebuild. This approach is particularly useful in microservices environments where configuration changes need to be rolled out gradually and validated before full deployment.
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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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
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. — AWS AppConfig is purpose-built for managing application configuration and supports automatic deployment of configuration changes to ECS services when a parameter in Systems Manager Parameter Store is updated. By creating a configuration profile that references the parameter, AppConfig can trigger a deployment that updates the ECS service without requiring custom code or manual intervention, minimizing operational overhead.
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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Last reviewed: Jul 4, 2026
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