- A
Use AWS Secrets Manager to store the credentials and configure automatic rotation with the RDS rotation Lambda blueprint.
Secrets Manager supports automatic rotation via Lambda, including a built-in RDS rotation template.
- B
Store credentials in AWS Systems Manager Parameter Store and use a Lambda function to rotate them.
Why wrong: Parameter Store does not have built-in rotation; a custom solution is needed, making it less ideal than Secrets Manager.
- C
Store credentials in an S3 bucket encrypted with KMS and use S3 Lifecycle policies to rotate the objects.
Why wrong: S3 Lifecycle policies manage object lifecycle, not credential rotation.
- D
Use IAM roles to grant the EC2 instance access to the database, eliminating the need for credentials.
Why wrong: IAM roles are for AWS API access, not database credentials; this option is not applicable for most databases.
DOP-C02 Security and Compliance Practice Question
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 DevOps engineer needs to securely store database credentials for an application running on EC2. The credentials must be rotated automatically every 30 days. Which solution meets these requirements?
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
Use AWS Secrets Manager to store the credentials and configure automatic rotation with the RDS rotation Lambda blueprint.
AWS Secrets Manager is the correct choice because it is purpose-built for securely storing, managing, and automatically rotating database credentials. It provides a built-in RDS rotation Lambda blueprint that can be configured to rotate credentials every 30 days without custom code. This fully managed rotation capability meets the requirement for automatic, scheduled rotation with minimal operational overhead.
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 Secrets Manager to store the credentials and configure automatic rotation with the RDS rotation Lambda blueprint.
Why this is correct
Secrets Manager supports automatic rotation via Lambda, including a built-in RDS rotation template.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store credentials in AWS Systems Manager Parameter Store and use a Lambda function to rotate them.
Why it's wrong here
Parameter Store does not have built-in rotation; a custom solution is needed, making it less ideal than Secrets Manager.
- ✗
Store credentials in an S3 bucket encrypted with KMS and use S3 Lifecycle policies to rotate the objects.
Why it's wrong here
S3 Lifecycle policies manage object lifecycle, not credential rotation.
- ✗
Use IAM roles to grant the EC2 instance access to the database, eliminating the need for credentials.
Why it's wrong here
IAM roles are for AWS API access, not database credentials; this option is not applicable for most databases.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Systems Manager Parameter Store's ability to store secrets (with SecureString) with the automatic rotation capability, but Parameter Store lacks built-in rotation scheduling and requires custom Lambda code, making Secrets Manager the only fully managed solution for automatic credential rotation.
Detailed technical explanation
How to think about this question
Secrets Manager uses a Lambda function (the RDS rotation blueprint) that performs the rotation by creating a new secret version, updating the database password, and testing the new credentials before marking the old version as deprecated. The rotation schedule is defined using a cron or rate expression in CloudWatch Events, allowing precise 30-day intervals. Under the hood, Secrets Manager encrypts secrets at rest using KMS and enforces fine-grained access control via IAM policies, ensuring only authorized EC2 instances (with appropriate instance profiles) can retrieve the current secret.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Security and Compliance — study guide chapter
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Security and Compliance practice questions
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: Use AWS Secrets Manager to store the credentials and configure automatic rotation with the RDS rotation Lambda blueprint. — AWS Secrets Manager is the correct choice because it is purpose-built for securely storing, managing, and automatically rotating database credentials. It provides a built-in RDS rotation Lambda blueprint that can be configured to rotate credentials every 30 days without custom code. This fully managed rotation capability meets the requirement for automatic, scheduled rotation with minimal operational overhead.
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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Last reviewed: Jun 24, 2026
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