The answer is to attach an IAM role to the Lambda function with permissions to read the secret and retrieve it at runtime. This is the most secure approach because it follows the principle of least privilege, avoids hardcoding credentials, and ensures the secret is never stored or transmitted in plaintext—it is fetched dynamically from Secrets Manager only when the function executes. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of secure secret retrieval patterns versus common insecure shortcuts, such as embedding secrets in environment variables or relying solely on KMS encryption, which still leaves secrets exposed in logs or configuration. A frequent trap is assuming that encrypting environment variables with KMS is sufficient, but the secret remains present in the function’s static configuration. Memory tip: “Fetch, don’t store”—always retrieve secrets at runtime via IAM, never embed them.
DOP-C02 Security and Compliance Practice Question
This DOP-C02 practice question tests your understanding of security and compliance. 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 has an AWS Lambda function that processes sensitive data. The function needs to access an RDS database with credentials stored in Secrets Manager. What is the MOST secure way to grant the Lambda function access to the secret?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Attach an IAM role to the Lambda function with permissions to read the secret and retrieve it at runtime.
Option A is correct because using an IAM role with the necessary permissions and retrieving the secret at runtime is standard practice. Option B is wrong because embedding secrets in environment variables is insecure. Option C is wrong because KMS is for encryption, not storing secrets. Option D is wrong because Lambda environment variables can be encrypted but still expose secrets in logs.
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 KMS to encrypt the credentials and pass them as parameters.
Why it's wrong here
KMS encrypts data but does not manage secrets.
✓
Attach an IAM role to the Lambda function with permissions to read the secret and retrieve it at runtime.
Why this is correct
Securely grants access without embedding secrets.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store the credentials directly in the Lambda function's environment variables.
Why it's wrong here
Exposes secrets in the function configuration.
✗
Use Lambda environment variables with encryption enabled.
Why it's wrong here
Still visible in plaintext in logs or configuration.
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.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-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.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Attach an IAM role to the Lambda function with permissions to read the secret and retrieve it at runtime. — Option A is correct because using an IAM role with the necessary permissions and retrieving the secret at runtime is standard practice. Option B is wrong because embedding secrets in environment variables is insecure. Option C is wrong because KMS is for encryption, not storing secrets. Option D is wrong because Lambda environment variables can be encrypted but still expose secrets in logs.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-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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This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
Question Discussion
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