- A
CodeCommit -> CodeBuild (test) -> CodeDeploy (Lambda deployment) -> Lambda.
CodeDeploy provides canary, linear, and all-at-once deployments for Lambda.
- B
CodeCommit -> CodeBuild (test) -> Lambda (deploy via update-function-code).
Why wrong: Directly calling Lambda update-function-code is not a managed deployment approach.
- C
CodeCommit -> Lambda (deploy via S3 trigger) -> CodeBuild (test) -> production.
Why wrong: Testing after deployment is risky; testing should happen before deployment.
- D
CodeCommit -> CodeBuild (test and deploy) -> Lambda via AWS CLI in buildspec.
Why wrong: Running CLI commands in buildspec is less secure and not as traceable.
Question 308 of 1,750
CI/CD Pipeline for Lambda with Canary Deployments
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 engineer is designing a CI/CD pipeline for a serverless application using AWS Lambda. They want to automatically deploy the latest version of the Lambda function to production after running integration tests. The source code is in AWS CodeCommit. Which pipeline configuration should they use?
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
✓
CodeCommit -> CodeBuild (test) -> CodeDeploy (Lambda deployment) -> Lambda.
Option A is correct because it uses CodeDeploy's built-in Lambda deployment support, which enables safe, gradual traffic shifting (e.g., canary or linear deployments) and automatic rollback on CloudWatch alarm failures. This pipeline integrates CodeCommit for source, CodeBuild for integration tests, and CodeDeploy to orchestrate the Lambda update with minimal risk, aligning with AWS best practices for serverless CI/CD.
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.
- ✓
CodeCommit -> CodeBuild (test) -> CodeDeploy (Lambda deployment) -> Lambda.
Why this is correct
CodeDeploy provides canary, linear, and all-at-once deployments for Lambda.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
CodeCommit -> CodeBuild (test) -> Lambda (deploy via update-function-code).
Why it's wrong here
Directly calling Lambda update-function-code is not a managed deployment approach.
- ✗
CodeCommit -> Lambda (deploy via S3 trigger) -> CodeBuild (test) -> production.
Why it's wrong here
Testing after deployment is risky; testing should happen before deployment.
- ✗
CodeCommit -> CodeBuild (test and deploy) -> Lambda via AWS CLI in buildspec.
Why it's wrong here
Running CLI commands in buildspec is less secure and not as traceable.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume any pipeline that runs tests before deploying to Lambda is sufficient, but the exam specifically tests the need for managed deployment strategies (CodeDeploy) over direct API calls or CLI commands to ensure production safety and rollback capabilities.
Trap categories for this question
Command / output trap
Running CLI commands in buildspec is less secure and not as traceable.
Detailed technical explanation
How to think about this question
CodeDeploy for Lambda uses the AppSpec file to define pre/post-traffic hook functions (e.g., validation tests) and traffic routing rules (e.g., Canary10Percent5Minutes). Under the hood, CodeDeploy invokes the Lambda API to create a new version and then shifts traffic by updating the alias's routing configuration, enabling gradual rollouts and instant rollback if a CloudWatch alarm triggers. This is distinct from a simple update-function-code call, which immediately replaces the $LATEST version and can cause downtime if the new code has errors.
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.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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 — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: CodeCommit -> CodeBuild (test) -> CodeDeploy (Lambda deployment) -> Lambda. — Option A is correct because it uses CodeDeploy's built-in Lambda deployment support, which enables safe, gradual traffic shifting (e.g., canary or linear deployments) and automatic rollback on CloudWatch alarm failures. This pipeline integrates CodeCommit for source, CodeBuild for integration tests, and CodeDeploy to orchestrate the Lambda update with minimal risk, aligning with AWS best practices for serverless CI/CD.
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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