- A
Enable X-Ray tracing on each Lambda function individually and deploy the X-Ray daemon as a Lambda layer.
Why wrong: Enabling X-Ray on each function individually is more work and not minimal. Additionally, deploying the X-Ray daemon as a Lambda layer is unnecessary because the X-Ray SDK is already integrated into the Lambda runtime. The AWSXRayDaemonWriteAccess managed policy grants permissions to write trace data, but the daemon itself is built into the runtime, not part of the policy.
- B
Enable X-Ray tracing only on the API Gateway stage and configure the Lambda functions to forward traces.
Why wrong: Incorrect. Enabling X-Ray tracing only on the API Gateway stage does not automatically enable tracing for Lambda functions, as each function must have tracing enabled and the appropriate IAM permissions.
- C
Deploy the X-Ray daemon as a sidecar container on each Lambda function.
Why wrong: Incorrect. Lambda functions do not use sidecar containers; X-Ray tracing is integrated natively via the X-Ray SDK, and the daemon is included in the runtime environment.
- D
Add Tracing: Active to the Globals section of the SAM template and attach the AWSXRayDaemonWriteAccess managed policy to the Lambda execution role.
Correct. Adding Tracing: Active to the Globals section enables X-Ray tracing for all Lambda functions and API Gateway resources by default, and attaching the AWSXRayDaemonWriteAccess policy provides the necessary permissions.
How to Enable X-Ray Tracing for All Lambda Functions and API Gateway in SAM
This DVA-C02 practice question tests your understanding of development with aws services. 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 developer is deploying a serverless application using AWS SAM. The application includes an API Gateway REST API and several Lambda functions. The developer wants to enable X-Ray tracing to debug performance issues. What is the MINIMUM set of actions required to enable X-Ray tracing for the entire application?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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
Add Tracing: Active to the Globals section of the SAM template and attach the AWSXRayDaemonWriteAccess managed policy to the Lambda execution role.
Option D is correct. In AWS SAM, you can enable X-Ray tracing globally for all resources by adding Tracing: Active to the Globals section of the SAM template. Additionally, the Lambda execution role must have permissions to write trace data to X-Ray, which is provided by the AWSXRayDaemonWriteAccess managed policy. This is the minimum set because it applies to all functions and the API Gateway automatically, without needing to configure each resource individually. Option A is incorrect because enabling X-Ray on each function individually is more work and not minimal. Option B is incorrect because enabling tracing only on API Gateway does not trace Lambda functions. Option C is incorrect because deploying the X-Ray daemon is not required; Lambda functions use the X-Ray SDK, not a sidecar daemon.
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.
- ✗
Enable X-Ray tracing on each Lambda function individually and deploy the X-Ray daemon as a Lambda layer.
Why it's wrong here
Enabling X-Ray on each function individually is more work and not minimal. Additionally, deploying the X-Ray daemon as a Lambda layer is unnecessary because the X-Ray SDK is already integrated into the Lambda runtime. The AWSXRayDaemonWriteAccess managed policy grants permissions to write trace data, but the daemon itself is built into the runtime, not part of the policy.
- ✗
Enable X-Ray tracing only on the API Gateway stage and configure the Lambda functions to forward traces.
Why it's wrong here
Incorrect. Enabling X-Ray tracing only on the API Gateway stage does not automatically enable tracing for Lambda functions, as each function must have tracing enabled and the appropriate IAM permissions.
- ✗
Deploy the X-Ray daemon as a sidecar container on each Lambda function.
Why it's wrong here
Incorrect. Lambda functions do not use sidecar containers; X-Ray tracing is integrated natively via the X-Ray SDK, and the daemon is included in the runtime environment.
- ✓
Add Tracing: Active to the Globals section of the SAM template and attach the AWSXRayDaemonWriteAccess managed policy to the Lambda execution role.
Why this is correct
Correct. Adding Tracing: Active to the Globals section enables X-Ray tracing for all Lambda functions and API Gateway resources by default, and attaching the AWSXRayDaemonWriteAccess policy provides the necessary permissions.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 DVA-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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add Tracing: Active to the Globals section of the SAM template and attach the AWSXRayDaemonWriteAccess managed policy to the Lambda execution role. — Option D is correct. In AWS SAM, you can enable X-Ray tracing globally for all resources by adding Tracing: Active to the Globals section of the SAM template. Additionally, the Lambda execution role must have permissions to write trace data to X-Ray, which is provided by the AWSXRayDaemonWriteAccess managed policy. This is the minimum set because it applies to all functions and the API Gateway automatically, without needing to configure each resource individually. Option A is incorrect because enabling X-Ray on each function individually is more work and not minimal. Option B is incorrect because enabling tracing only on API Gateway does not trace Lambda functions. Option C is incorrect because deploying the X-Ray daemon is not required; Lambda functions use the X-Ray SDK, not a sidecar daemon.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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