This DOP-C02 practice question tests your understanding of security and compliance. 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 company uses AWS Secrets Manager to store database credentials. The security team wants to automatically rotate secrets every 30 days. The database is an Amazon RDS for PostgreSQL instance. The team has configured automatic rotation with a Lambda function that updates the password in RDS and Secrets Manager. However, after the first rotation, the application starts getting database connection errors. The application uses a connection string with the secret ARN and retrieves the secret from Secrets Manager at startup using the AWS SDK. Which of the following is the most likely cause of the connection errors?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The application caches the secret at startup and does not refresh it after rotation.
Option B is correct because if the application caches the secret, it will not pick up the new password after rotation, leading to connection errors. Option A is incorrect because RDS automatic password rotation is not a feature; Secrets Manager handles rotation. Option C is incorrect because KMS permissions are needed to decrypt the secret, but if the application could access the secret initially, it likely has permissions. Option D is incorrect because Lambda function concurrency is unlikely to cause connection errors; it would affect the rotation process itself.
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.
✗
The Lambda function is not configured with a sufficient timeout and is being throttled.
Why it's wrong here
Throttling would cause rotation to fail, not connection errors after successful rotation.
✓
The application caches the secret at startup and does not refresh it after rotation.
Why this is correct
Caching the secret prevents the application from using the new password.
Clue confirmation
The clue words "first", "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Lambda function does not have permission to update the secret in Secrets Manager.
Why it's wrong here
If rotation succeeded, the Lambda likely had permissions; the issue is on the application side.
✗
The RDS instance has automatic password rotation enabled, which conflicts with Secrets Manager rotation.
Why it's wrong here
RDS does not have automatic password rotation; Secrets Manager handles it.
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: The application caches the secret at startup and does not refresh it after rotation. — Option B is correct because if the application caches the secret, it will not pick up the new password after rotation, leading to connection errors. Option A is incorrect because RDS automatic password rotation is not a feature; Secrets Manager handles rotation. Option C is incorrect because KMS permissions are needed to decrypt the secret, but if the application could access the secret initially, it likely has permissions. Option D is incorrect because Lambda function concurrency is unlikely to cause connection errors; it would affect the rotation process itself.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first", "most likely". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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