The answer is to store the password in AWS Secrets Manager with automatic rotation enabled and reference it in the CloudFormation template using a dynamic reference. This approach is correct because the `{{resolve:secretsmanager:secret-id:SecretString:password}}` syntax allows CloudFormation to retrieve the secret at deploy time without ever exposing the password in the template or stack logs, while Secrets Manager handles the scheduled rotation independently of the stack lifecycle. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of secure parameter handling and the integration between CloudFormation dynamic references and Secrets Manager’s rotation capabilities—a common trap is choosing Systems Manager Parameter Store, which lacks native rotation for RDS passwords. Remember the mnemonic: "Resolve, Rotate, RDS" to link dynamic references, automatic rotation, and database security.
DOP-C02 SDLC Automation Practice Question
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 company uses AWS CloudFormation to manage infrastructure. They want to deploy a stack that creates an Amazon RDS DB instance. The database password must be stored securely and rotated automatically. Which approach meets these requirements?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Store the password in AWS Secrets Manager and enable automatic rotation. Reference the secret in the template using a dynamic reference.
Option D is correct because AWS Secrets Manager provides built-in capabilities for automatic password rotation, which is a requirement. By storing the password in Secrets Manager and referencing it in the CloudFormation template using a dynamic reference (e.g., `{{resolve:secretsmanager:secret-id:SecretString:password}}`), the password is never exposed in the template or parameter logs, and rotation can be configured without updating the stack. This approach meets both security and automation requirements.
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.
✗
Hardcode the password in the CloudFormation template and use a NoEcho parameter.
Why it's wrong here
Hardcoding is insecure.
✗
Use AWS Key Management Service (KMS) to encrypt the password and pass it as a parameter.
Why it's wrong here
KMS does not manage rotation.
✗
Store the password in AWS Systems Manager Parameter Store and reference it using a dynamic reference.
Why it's wrong here
Parameter Store does not support automatic rotation.
✓
Store the password in AWS Secrets Manager and enable automatic rotation. Reference the secret in the template using a dynamic reference.
Why this is correct
Secrets Manager supports rotation and dynamic references.
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 confuse AWS Systems Manager Parameter Store with AWS Secrets Manager, assuming both support automatic rotation, but only Secrets Manager provides native rotation capabilities for RDS credentials.
Detailed technical explanation
How to think about this question
AWS Secrets Manager uses a built-in rotation function (Lambda) that can rotate RDS passwords without downtime by creating a new password, updating the RDS instance, and testing the new credential before deleting the old one. The dynamic reference in CloudFormation is resolved at deploy time and the secret value is never stored in the stack template or metadata, ensuring compliance with security best practices. In contrast, Parameter Store dynamic references (`{{resolve:ssm:...}}`) do not support rotation and are intended for static configuration 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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 — 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: Store the password in AWS Secrets Manager and enable automatic rotation. Reference the secret in the template using a dynamic reference. — Option D is correct because AWS Secrets Manager provides built-in capabilities for automatic password rotation, which is a requirement. By storing the password in Secrets Manager and referencing it in the CloudFormation template using a dynamic reference (e.g., `{{resolve:secretsmanager:secret-id:SecretString:password}}`), the password is never exposed in the template or parameter logs, and rotation can be configured without updating the stack. This approach meets both security and automation requirements.
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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Question Discussion
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