The recommended approach is to use an IAM role attached to the EC2 instance, allowing it to retrieve secrets from AWS Secrets Manager via the EC2 Instance Metadata Service (IMDSv2) at launch. This method is secure because IMDSv2 requires a session-oriented PUT request to obtain a token, which protects against SSRF attacks, and secrets are never stored on disk or transmitted in plaintext during the launch process. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of how to avoid embedding secrets in user data or AMIs, a common trap where developers mistakenly pass secrets as environment variables or store them in configuration files. The key insight is that the instance itself never holds the secret—it fetches it on demand using its IAM role. Memory tip: think “IMDSv2 + IAM = no secret on disk,” and remember that user data is visible to anyone who can describe the instance, so always use Secrets Manager with IMDSv2 for launch-time secrets.
DVA-C02 Security Practice Question
This DVA-C02 practice question tests your understanding of security. 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 developer wants to securely transmit secrets to an EC2 instance at launch. Which approach is recommended?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use EC2 Instance Metadata Service (IMDSv2) to retrieve secrets from AWS Secrets Manager
Option D is correct because the recommended approach to securely transmit secrets to an EC2 instance at launch is to use an IAM role attached to the instance, which grants the instance permission to retrieve secrets from AWS Secrets Manager via the EC2 Instance Metadata Service (IMDSv2). IMDSv2 requires a session-oriented PUT request to obtain a token, mitigating the risk of SSRF attacks, and secrets are never stored on disk or transmitted in plaintext during launch.
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.
✗
Store secrets in environment variables within an AMI
Why it's wrong here
Environment variables in AMIs can be extracted.
✗
Hardcode secrets in the application code
Why it's wrong here
Hardcoding is a security risk.
✗
Pass secrets in user data as plain text
Why it's wrong here
User data is visible to anyone with access to the instance metadata.
✓
Use EC2 Instance Metadata Service (IMDSv2) to retrieve secrets from AWS Secrets Manager
Why this is correct
IMDSv2 provides a secure way to access secrets via IAM roles.
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 may think user data is secure because it is only accessible at launch, but they overlook that user data is stored in plaintext and can be read via the metadata service or CloudTrail, whereas IMDSv2 with Secrets Manager provides encryption and access control.
Detailed technical explanation
How to think about this question
Under the hood, the instance retrieves secrets by first obtaining a session token via a PUT request to http://169.254.169.254/latest/api/token (with a TTL), then using that token in subsequent GET requests to the IMDSv2 endpoint. The IAM role attached to the instance provides temporary credentials via the instance profile, which are used to call the AWS Secrets Manager API (e.g., GetSecretValue) — this avoids any long-lived credentials or plaintext exposure. A real-world scenario is a web application that needs database credentials at boot; using this pattern ensures secrets are rotated automatically and never stored in the AMI or user data.
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 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.
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.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use EC2 Instance Metadata Service (IMDSv2) to retrieve secrets from AWS Secrets Manager — Option D is correct because the recommended approach to securely transmit secrets to an EC2 instance at launch is to use an IAM role attached to the instance, which grants the instance permission to retrieve secrets from AWS Secrets Manager via the EC2 Instance Metadata Service (IMDSv2). IMDSv2 requires a session-oriented PUT request to obtain a token, mitigating the risk of SSRF attacks, and secrets are never stored on disk or transmitted in plaintext during launch.
What should I do if I get this DVA-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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