- A
secretsmanager:ListSecrets on all secrets (resource set to "*")
Why wrong: ListSecrets allows enumerating secrets. If the function already knows the specific secret it must read, enumeration is unnecessary and violates least privilege by granting access to potentially many secrets.
- B
secretsmanager:GetSecretValue on only the secret’s full ARN
GetSecretValue is the specific action required to retrieve the secret value. Scoping the permission to the secret’s full ARN ensures the Lambda role can read only that secret and cannot access other secrets.
- C
secretsmanager:UpdateSecret on the specific secret ARN
Why wrong: UpdateSecret grants write/update capabilities to the secret. The scenario requires reading only, so granting update permissions increases risk if the function code or execution role is compromised.
- D
secretsmanager:DescribeSecret on all secrets (resource set to "*")
Why wrong: DescribeSecret returns metadata about a secret (for example, name/rotation settings) and does not provide the secret value itself. Using "*" is also broader than required.
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 Lambda function needs to read the current value of exactly one AWS Secrets Manager secret at startup. Which least-privilege IAM permission (action and resource scope) should you grant to the Lambda execution role?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
secretsmanager:GetSecretValue on only the secret’s full ARN
The Lambda function needs to read the current value of exactly one secret at startup. The least-privilege permission is `secretsmanager:GetSecretValue` scoped to that secret's full ARN. This action retrieves the secret value, and restricting the resource to the specific ARN ensures the function cannot access any other secrets.
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.
- ✗
secretsmanager:ListSecrets on all secrets (resource set to "*")
Why it's wrong here
ListSecrets allows enumerating secrets. If the function already knows the specific secret it must read, enumeration is unnecessary and violates least privilege by granting access to potentially many secrets.
When this WOULD be correct
If the Lambda function needed to discover which secrets exist (e.g., to dynamically select one based on naming pattern) before reading its value, then secretsmanager:ListSecrets on all secrets would be appropriate.
- ✓
secretsmanager:GetSecretValue on only the secret’s full ARN
Why this is correct
GetSecretValue is the specific action required to retrieve the secret value. Scoping the permission to the secret’s full ARN ensures the Lambda role can read only that secret and cannot access other secrets.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
secretsmanager:UpdateSecret on the specific secret ARN
Why it's wrong here
UpdateSecret grants write/update capabilities to the secret. The scenario requires reading only, so granting update permissions increases risk if the function code or execution role is compromised.
When this WOULD be correct
A Lambda function that needs to rotate a secret (e.g., update a database password) after reading it would require secretsmanager:UpdateSecret on the specific secret ARN to write the new value.
- ✗
secretsmanager:DescribeSecret on all secrets (resource set to "*")
Why it's wrong here
DescribeSecret returns metadata about a secret (for example, name/rotation settings) and does not provide the secret value itself. Using "*" is also broader than required.
When this WOULD be correct
A question that asks for listing metadata of all secrets (e.g., to check rotation status) and least privilege is not a concern, or the requirement is to retrieve metadata for any secret in the account.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The SAA-C03 exam frequently reuses these exact scenarios with slightly different constraints.
✓secretsmanager:GetSecretValue on only the secret’s full ARNCorrect answer▾
Why this is correct
GetSecretValue is the specific action required to retrieve the secret value. Scoping the permission to the secret’s full ARN ensures the Lambda role can read only that secret and cannot access other secrets.
✗secretsmanager:ListSecrets on all secrets (resource set to "*")Wrong answer — click to see why▾
Why this is wrong here
The question requires reading exactly one secret's value at startup, so listing all secrets is unnecessary and violates least privilege by granting access to all secrets.
★ When this WOULD be the correct answer
If the Lambda function needed to discover which secrets exist (e.g., to dynamically select one based on naming pattern) before reading its value, then secretsmanager:ListSecrets on all secrets would be appropriate.
Why candidates choose this
Candidates may think listing is a harmless read operation, but they overlook that least privilege demands scoping to the specific secret ARN, not all secrets.
✗secretsmanager:UpdateSecret on the specific secret ARNWrong answer — click to see why▾
Why this is wrong here
The question asks for reading a secret value at startup, but UpdateSecret is a write operation that modifies the secret, not reads it. It does not satisfy the requirement to read the current value.
★ When this WOULD be the correct answer
A Lambda function that needs to rotate a secret (e.g., update a database password) after reading it would require secretsmanager:UpdateSecret on the specific secret ARN to write the new value.
Why candidates choose this
Candidates may confuse the action needed for reading versus updating, or think that UpdateSecret is needed to 'refresh' the secret value, not realizing that GetSecretValue alone suffices for reading.
✗secretsmanager:DescribeSecret on all secrets (resource set to "*")Wrong answer — click to see why▾
Why this is wrong here
The question requires reading the current secret value, but DescribeSecret only retrieves metadata (e.g., rotation date, tags) and not the secret value. Additionally, scoping to all secrets violates least privilege.
★ When this WOULD be the correct answer
A question that asks for listing metadata of all secrets (e.g., to check rotation status) and least privilege is not a concern, or the requirement is to retrieve metadata for any secret in the account.
Why candidates choose this
Candidates may confuse DescribeSecret with GetSecretValue, thinking it returns the secret value, or they may over-scope resources out of convenience.
Analysis generated from the official SAA-C03blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse `ListSecrets` or `DescribeSecret` with `GetSecretValue`, thinking metadata retrieval is sufficient, or they may apply a broad resource scope ("*") instead of the specific ARN, violating the least-privilege principle that AWS emphasizes in the SAA-C03 exam.
Trap categories for this question
Scenario analysis trap
UpdateSecret grants write/update capabilities to the secret. The scenario requires reading only, so granting update permissions increases risk if the function code or execution role is compromised.
Detailed technical explanation
How to think about this question
Under the hood, `GetSecretValue` calls the AWS Secrets Manager HTTPS API (e.g., `POST /secretsmanager/v1/secret/{SecretId}/value`) to retrieve the plaintext secret value, which is decrypted using the KMS key associated with the secret. A subtle behavior is that if the secret uses automatic rotation, `GetSecretValue` returns the current version (AWSCURRENT) by default, but you can specify a version stage or ID. In a real-world scenario, if the Lambda function is part of a microservice that needs database credentials at cold start, scoping to the specific secret ARN prevents it from accidentally reading other secrets (e.g., API keys) and reduces blast radius.
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 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.
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.
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: secretsmanager:GetSecretValue on only the secret’s full ARN — The Lambda function needs to read the current value of exactly one secret at startup. The least-privilege permission is `secretsmanager:GetSecretValue` scoped to that secret's full ARN. This action retrieves the secret value, and restricting the resource to the specific ARN ensures the function cannot access any other secrets.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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