- A
Store the password in Systems Manager Parameter Store as a SecureString and grant the ECS task role GetParameter only for that parameter ARN. Have the application call GetParameter on each request or on a short refresh interval.
Why wrong: Parameter Store can support secure storage, but the question explicitly emphasizes Secrets Manager controls and rotation; also, redeploy avoidance depends on application refresh behavior and secret rotation integration.
- B
Store the password in AWS Secrets Manager. Configure rotation for the secret. Grant the ECS task role secretsmanager:GetSecretValue for only that secret ARN. Update the application to fetch the secret at runtime and cache it briefly.
Secrets Manager provides encrypted-at-rest storage and supports managed rotation. ECS task roles provide least-privilege access without static keys. Fetching at runtime with brief caching supports rotation without redeploying the task definition.
- C
Store the password in a local file within the container image and mount it as a Docker secret at build time to avoid environment variables.
Why wrong: Including credentials in images increases leakage risk and does not provide a robust rotation mechanism. Least-privilege access via IAM roles is not used effectively.
- D
Store the password in an S3 bucket with server-side encryption and allow all ECS tasks to read it using a broad IAM policy on the bucket prefix.
Why wrong: S3 is not a purpose-built secrets storage service, and broad IAM permissions violate least privilege. Rotation and secret lifecycle controls are weaker compared with Secrets Manager.
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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. A key principle to apply: aWS Secrets Manager encrypts secrets at rest using AWS KMS.. 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 containerized web service on Amazon ECS reads a database password at startup. Today, the password is stored in a plain environment variable and updated manually. Auditors require that credentials: (1) are encrypted at rest using AWS-managed controls, (2) can be rotated without redeploying the task definition, and (3) are accessible only to the running task via least-privilege permissions.
Which solution best meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue:
"least"Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
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
Store the password in AWS Secrets Manager. Configure rotation for the secret. Grant the ECS task role secretsmanager:GetSecretValue for only that secret ARN. Update the application to fetch the secret at runtime and cache it briefly.
Option B is correct because AWS Secrets Manager provides automatic rotation of secrets without redeploying the task definition, encryption at rest via AWS KMS, and fine-grained IAM permissions. By granting the ECS task role only `secretsmanager:GetSecretValue` for the specific secret ARN, the application can fetch the password at runtime, meeting all three audit requirements.
Key principle: AWS Secrets Manager encrypts secrets at rest using AWS KMS.
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 the password in Systems Manager Parameter Store as a SecureString and grant the ECS task role GetParameter only for that parameter ARN. Have the application call GetParameter on each request or on a short refresh interval.
Why it's wrong here
Parameter Store can support secure storage, but the question explicitly emphasizes Secrets Manager controls and rotation; also, redeploy avoidance depends on application refresh behavior and secret rotation integration.
- ✓
Store the password in AWS Secrets Manager. Configure rotation for the secret. Grant the ECS task role secretsmanager:GetSecretValue for only that secret ARN. Update the application to fetch the secret at runtime and cache it briefly.
Why this is correct
Secrets Manager provides encrypted-at-rest storage and supports managed rotation. ECS task roles provide least-privilege access without static keys. Fetching at runtime with brief caching supports rotation without redeploying the task definition.
Clue confirmation
The clue words "best", "least" in the question point toward this answer.
Related concept
AWS Secrets Manager encrypts secrets at rest using AWS KMS.
- ✗
Store the password in a local file within the container image and mount it as a Docker secret at build time to avoid environment variables.
Why it's wrong here
Including credentials in images increases leakage risk and does not provide a robust rotation mechanism. Least-privilege access via IAM roles is not used effectively.
- ✗
Store the password in an S3 bucket with server-side encryption and allow all ECS tasks to read it using a broad IAM policy on the bucket prefix.
Why it's wrong here
S3 is not a purpose-built secrets storage service, and broad IAM permissions violate least privilege. Rotation and secret lifecycle controls are weaker compared with Secrets Manager.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose Parameter Store (Option A) because it is cheaper and can store SecureStrings, but they overlook the explicit requirement for automatic rotation without custom infrastructure, which Secrets Manager natively supports.
Detailed technical explanation
How to think about this question
AWS Secrets Manager integrates with AWS KMS to encrypt secrets at rest using a customer master key (CMK) or AWS managed key. The `secretsmanager:GetSecretValue` API call returns the secret in plaintext over TLS, and the ECS task role must have an IAM policy that explicitly allows access to the secret's ARN. Secrets Manager can automatically rotate secrets on a schedule (e.g., every 30 days) by invoking a Lambda function, which updates the secret in both the service and the database without any application redeployment.
KKey Concepts to Remember
- AWS Secrets Manager encrypts secrets at rest using AWS KMS.
- Secrets Manager supports automated rotation for various database types.
- IAM task roles provide least-privilege access to specific secrets.
- Applications fetch secrets at runtime, enabling rotation without redeployment.
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
AWS Secrets Manager encrypts secrets at rest using AWS KMS.
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.
What to study next
Got this wrong? Here's your next step.
Review aWS Secrets Manager encrypts secrets at rest using AWS KMS., then practise related SAA-C03 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — AWS Secrets Manager encrypts secrets at rest using AWS KMS..
What is the correct answer to this question?
The correct answer is: Store the password in AWS Secrets Manager. Configure rotation for the secret. Grant the ECS task role secretsmanager:GetSecretValue for only that secret ARN. Update the application to fetch the secret at runtime and cache it briefly. — Option B is correct because AWS Secrets Manager provides automatic rotation of secrets without redeploying the task definition, encryption at rest via AWS KMS, and fine-grained IAM permissions. By granting the ECS task role only `secretsmanager:GetSecretValue` for the specific secret ARN, the application can fetch the password at runtime, meeting all three audit requirements.
What should I do if I get this SAA-C03 question wrong?
Review aWS Secrets Manager encrypts secrets at rest using AWS KMS., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best", "least". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
AWS Secrets Manager encrypts secrets at rest using AWS KMS.
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Last reviewed: Jun 11, 2026
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