The answer is using AWS CodeDeploy to deploy the Lambda function with traffic shifting, along with using AWS CloudFormation to manage the Lambda function as part of a stack update. CodeDeploy enables safe, gradual traffic shifting for Lambda aliases, allowing you to validate new code versions before routing full traffic, which is essential for canary or linear deployments. CloudFormation, on the other hand, treats the Lambda function as infrastructure-as-code, so CodePipeline can trigger a stack update to create or update the function, ensuring consistent and repeatable deployments. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of valid deployment methods within a serverless CI/CD pipeline—a common trap is assuming only one method is valid, but both CloudFormation stack updates and CodeDeploy traffic shifting are explicitly supported. Remember the memory tip: “Shift with CodeDeploy, stack with CloudFormation” to recall that traffic shifting belongs to CodeDeploy, while stack updates belong to CloudFormation.
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 is designing a CI/CD pipeline for a serverless application using AWS CodePipeline. Which TWO actions are valid ways to deploy an AWS Lambda function?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS CloudFormation to update the Lambda function's stack.
Option A is correct because AWS CloudFormation can manage Lambda function deployments as part of a stack update. By defining the Lambda function resource in a CloudFormation template, CodePipeline can trigger a stack update that creates or updates the function, ensuring infrastructure-as-code best practices and consistent deployments.
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 CloudFormation to update the Lambda function's stack.
Why this is correct
CloudFormation can manage Lambda deployments.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon S3 to trigger the Lambda function deployment.
Why it's wrong here
S3 is storage, not a deploy service.
✗
Use AWS CodeBuild to directly deploy the Lambda function.
Why it's wrong here
CodeBuild is a build service, not a deploy service.
✗
Use AWS CodeCommit to push the Lambda code.
Why it's wrong here
CodeCommit is a source repository.
✓
Use AWS CodeDeploy to deploy the Lambda function with traffic shifting.
Why this is correct
CodeDeploy supports Lambda deployments with traffic shifting.
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 build or source control actions (CodeBuild, CodeCommit) with deployment actions, or mistake event-driven invocations (S3 triggers) for deployment mechanisms, leading them to select options that are valid for other purposes but not for deploying Lambda functions.
Detailed technical explanation
How to think about this question
AWS CodeDeploy (Option E) supports Lambda deployments with traffic shifting using canary or linear strategies, allowing gradual routing of invocations to a new function version. This is achieved through the AWS CodeDeploy service integrated with Lambda aliases, which updates the alias's routing configuration to shift traffic between the old and new versions based on a defined percentage or interval.
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 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 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: Use AWS CloudFormation to update the Lambda function's stack. — Option A is correct because AWS CloudFormation can manage Lambda function deployments as part of a stack update. By defining the Lambda function resource in a CloudFormation template, CodePipeline can trigger a stack update that creates or updates the function, ensuring infrastructure-as-code best practices and consistent deployments.
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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