- A
Use IAM policies to restrict who can use and manage the keys.
IAM controls access to KMS keys.
- B
Enable automatic key rotation.
Rotation limits exposure if a key is compromised.
- C
Store the key material in plaintext in the application code.
Why wrong: Storing keys in code is insecure.
- D
Use a default cloud provider key to simplify management.
Why wrong: Customer-managed keys provide more control; default keys are provider-managed.
- E
Back up the key material securely in a separate location.
Backup ensures availability if the primary key is lost.
Question 785 of 997
CV0-004 Security Practice Question
This CV0-004 practice question tests your understanding of security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 security team is implementing encryption for data at rest using customer-managed keys in a cloud KMS. Which THREE practices should be followed?
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 IAM policies to restrict who can use and manage the keys.
Option A is correct because IAM policies are essential for enforcing the principle of least privilege in cloud KMS. By restricting who can use (encrypt/decrypt) and manage (rotate/disable/destroy) customer-managed keys, the security team ensures that only authorized principals can access the key material. This prevents unauthorized users or services from compromising data at rest, which is a core requirement for compliance frameworks like PCI DSS or HIPAA.
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 IAM policies to restrict who can use and manage the keys.
Why this is correct
IAM controls access to KMS keys.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable automatic key rotation.
Why this is correct
Rotation limits exposure if a key is compromised.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the key material in plaintext in the application code.
Why it's wrong here
Storing keys in code is insecure.
- ✗
Use a default cloud provider key to simplify management.
Why it's wrong here
Customer-managed keys provide more control; default keys are provider-managed.
- ✓
Back up the key material securely in a separate location.
Why this is correct
Backup ensures availability if the primary key is lost.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that storing keys in code is acceptable if the code is in a private repository, but the trap here is that any plaintext key in code is a critical vulnerability, regardless of repository access controls.
Detailed technical explanation
How to think about this question
Under the hood, cloud KMS services like AWS KMS or GCP Cloud KMS use hardware security modules (HSMs) to protect key material. Customer-managed keys allow you to set fine-grained IAM policies, enable automatic rotation (e.g., every 90 days in AWS KMS), and securely export key material for backup. A real-world scenario: if a key is accidentally deleted, a securely backed-up key material in a separate region or on-premises HSM can be re-imported to restore access to encrypted data, avoiding catastrophic data loss.
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 junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
Questions learners often ask
What does this CV0-004 question test?
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use IAM policies to restrict who can use and manage the keys. — Option A is correct because IAM policies are essential for enforcing the principle of least privilege in cloud KMS. By restricting who can use (encrypt/decrypt) and manage (rotate/disable/destroy) customer-managed keys, the security team ensures that only authorized principals can access the key material. This prevents unauthorized users or services from compromising data at rest, which is a core requirement for compliance frameworks like PCI DSS or HIPAA.
What should I do if I get this CV0-004 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: Jul 4, 2026
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.
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