The correct answer is to configure the CodePipeline Deploy action to wait for the previous deployment to finish before starting a new one. This resolves the concurrent deployment error because AWS CodeDeploy, by default, prevents multiple deployments from running simultaneously against the same deployment group; when a new pipeline execution triggers a deploy action while a previous one is still in progress, it throws the "deployment already exists" failure. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how to manage pipeline execution behavior and avoid race conditions in automated deployments. A common trap is assuming that disabling concurrent deployments in CodePipeline itself solves the issue, but the real fix lies in the Deploy action's settings within the pipeline stage—specifically, ensuring the action is configured to block until the prior deployment completes. Remember the memory tip: "Wait for the gate, don't conflate—CodeDeploy hates duplicate dates."
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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 company uses AWS CodePipeline to automate the deployment of a web application. The pipeline has three stages: Source (Amazon S3), Build (AWS CodeBuild), and Deploy (AWS CodeDeploy). Recently, the deployment stage started failing with the error 'The deployment failed because a deployment already exists for the deployment group'. The SysOps Administrator needs to fix the pipeline to allow deployments to proceed without manual intervention. The pipeline should only deploy if the previous deployment is successful. What should the administrator do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the CodePipeline Deploy action to wait for the previous deployment to finish before starting a new one.
Option D is correct. Configuring the deployment stage to wait for the previous deployment to complete before starting a new one ensures no concurrent deployments. Option A is wrong because disabling concurrent deployments does not prevent the pipeline from triggering a new deployment while one is in progress. Option B is wrong because enabling rollback does not address the concurrency issue. Option C is wrong because using a different deployment group for each pipeline execution is not practical.
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.
✗
Disable the concurrent deployment setting in the CodeDeploy deployment group.
Why it's wrong here
This setting does not exist; CodeDeploy allows only one deployment at a time per deployment group.
✓
Configure the CodePipeline Deploy action to wait for the previous deployment to finish before starting a new one.
Why this is correct
This ensures that the pipeline does not start a new deployment while one is in progress.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify the pipeline to use a new deployment group for each execution.
Why it's wrong here
This is not scalable and would require changes to CodeDeploy.
✗
Enable automatic rollback in the CodeDeploy deployment group.
Why it's wrong here
Rollback does not prevent concurrent deployments.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-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.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the CodePipeline Deploy action to wait for the previous deployment to finish before starting a new one. — Option D is correct. Configuring the deployment stage to wait for the previous deployment to complete before starting a new one ensures no concurrent deployments. Option A is wrong because disabling concurrent deployments does not prevent the pipeline from triggering a new deployment while one is in progress. Option B is wrong because enabling rollback does not address the concurrency issue. Option C is wrong because using a different deployment group for each pipeline execution is not practical.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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.
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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