This CCSP practice question tests your understanding of cloud application security. 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. 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 cloud application uses AWS Lambda functions in a serverless architecture. The security team wants to enforce least privilege access for these functions. Which THREE practices should be implemented?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use AWS Parameter Store or Secrets Manager for sensitive data
AWS Parameter Store or Secrets Manager are correct because they provide secure, auditable storage for sensitive data like database credentials and API keys. Lambda functions can retrieve these values at runtime via the AWS SDK, avoiding hard-coded secrets in code or environment variables. This aligns with the principle of least privilege by granting the Lambda IAM role only the specific permissions needed to access the secret, not the secret value itself in plaintext.
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 Parameter Store or Secrets Manager for sensitive data
Why this is correct
External secrets management reduces exposure.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store secrets in Lambda environment variables encrypted with KMS
Why it's wrong here
Environment variables can be logged or leaked; Secrets Manager is recommended.
✓
Assign a dedicated IAM role to each Lambda function
Why this is correct
Separate roles allow precise permission scoping.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Grant permissions based on the principle of minimal necessary access
Why this is correct
This is the core of least privilege.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a single IAM role for all Lambda functions for simplicity
Why it's wrong here
Single role violates least privilege and increases blast radius.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that encrypting environment variables with KMS is a sufficient substitute for using a dedicated secrets management service, but the trap is that environment variables are still visible in plaintext to anyone with console access or CloudTrail logs of the function configuration.
Detailed technical explanation
How to think about this question
Under the hood, AWS Lambda retrieves IAM role credentials from the instance metadata service (IMDS) at /latest/meta-data/iam/security-credentials/, which are temporary and rotated automatically. When using AWS Secrets Manager, the Lambda function must have an IAM policy with secretsmanager:GetSecretValue and a resource ARN pointing to the specific secret; the secret value is returned over TLS and cached in the execution environment for up to 1 hour by default. A real-world scenario: a Lambda processing credit card payments should only have access to the payment gateway secret, not the database secret used by another function.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
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.
Cloud Application Security — This question tests Cloud Application Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Parameter Store or Secrets Manager for sensitive data — AWS Parameter Store or Secrets Manager are correct because they provide secure, auditable storage for sensitive data like database credentials and API keys. Lambda functions can retrieve these values at runtime via the AWS SDK, avoiding hard-coded secrets in code or environment variables. This aligns with the principle of least privilege by granting the Lambda IAM role only the specific permissions needed to access the secret, not the secret value itself in plaintext.
What should I do if I get this CCSP 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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Question Discussion
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