The correct answer is a custom deployment configuration with 10% initial traffic and 100% after a 5-minute interval. This is because AWS CodeDeploy’s built-in canary configuration shifts 10% for 5 minutes but then automatically completes the deployment, whereas the requirement specifies a deliberate two-step shift where the remaining 90% is moved only after the 5-minute window, not immediately. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between built-in linear, canary, and custom configurations for ECS blue/green deployments. A common trap is assuming the built-in Canary10Percent5Minutes option matches, but it lacks the explicit second step to 100%—it finishes the deployment in one additional interval. Remember: if the problem states a specific percentage and time for each shift, you need a custom configuration; built-in options only handle one shift interval. Memory tip: “Custom for two-step, built-in for one-step.”
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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 implementing a blue/green deployment strategy for a microservice running on Amazon ECS with AWS CodeDeploy. They want to shift 10% of traffic to the new task set for 5 minutes, then shift the remaining 90%. Which deployment configuration should they use?
Why wrong: This shifts 10% every minute, not a single 10% then wait.
C
CodeDeployDefault.ECSCanary10Percent5Minutes
Why wrong: This shifts 10% then waits 5 minutes, then shifts the remaining 90%? Actually, the canary configuration shifts 10% and then after 5 minutes shifts the rest? Wait, the naming convention: CodeDeployDefault.ECSCanary10Percent5Minutes means 10% initially, then after 5 minutes the remaining 90%? I need to check.
D
Custom configuration with 10% initial traffic and 100% after 5-minute interval
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Custom configuration with 10% initial traffic and 100% after 5-minute interval
Option D is correct because the requirement specifies a 10% traffic shift for 5 minutes, followed by the remaining 90%. AWS CodeDeploy does not provide a built-in configuration that matches this exact pattern; the built-in canary option (C) shifts 10% for 5 minutes but then automatically completes the deployment after that interval, not waiting for a manual or additional step. Therefore, a custom configuration must be created with a 10% initial traffic percentage and a 100% final traffic percentage after a 5-minute interval to achieve the desired two-step linear shift.
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.
✗
CodeDeployDefault.ECSAllAtOnce
Why it's wrong here
This shifts all traffic at once.
✗
CodeDeployDefault.ECSLinear10PercentEvery1Minutes
Why it's wrong here
This shifts 10% every minute, not a single 10% then wait.
✗
CodeDeployDefault.ECSCanary10Percent5Minutes
Why it's wrong here
This shifts 10% then waits 5 minutes, then shifts the remaining 90%? Actually, the canary configuration shifts 10% and then after 5 minutes shifts the rest? Wait, the naming convention: CodeDeployDefault.ECSCanary10Percent5Minutes means 10% initially, then after 5 minutes the remaining 90%? I need to check.
✓
Custom configuration with 10% initial traffic and 100% after 5-minute interval
Why this is correct
Custom configuration allows exact specification.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the built-in canary configuration (Option C) with a custom configuration, assuming the canary's 5-minute interval includes a hold at 10% before the final shift, when in reality it automatically completes the deployment after the canary step without an additional wait.
Detailed technical explanation
How to think about this question
In AWS CodeDeploy for ECS, a custom deployment configuration allows you to define the exact traffic percentages and intervals using the 'trafficRouting' configuration in the AppSpec file or via the AWS CLI. The built-in canary configurations (e.g., ECSCanary10Percent5Minutes) are designed for a single canary step followed by an automatic 100% shift, whereas a custom configuration can specify multiple steps with arbitrary percentages and wait times, such as 10% for 5 minutes and then 100% after that interval. This is critical for scenarios requiring precise traffic management, like gradual rollouts with manual validation or integration with external monitoring tools.
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.
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Custom configuration with 10% initial traffic and 100% after 5-minute interval — Option D is correct because the requirement specifies a 10% traffic shift for 5 minutes, followed by the remaining 90%. AWS CodeDeploy does not provide a built-in configuration that matches this exact pattern; the built-in canary option (C) shifts 10% for 5 minutes but then automatically completes the deployment after that interval, not waiting for a manual or additional step. Therefore, a custom configuration must be created with a 10% initial traffic percentage and a 100% final traffic percentage after a 5-minute interval to achieve the desired two-step linear shift.
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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