Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company has a security policy that requires all Amazon EBS volumes attached to production Amazon EC2 instances to be encrypted at rest using customer-managed encryption keys. The policy also mandates that the encryption keys must be automatically rotated every 365 days. The company wants to minimize operational overhead by using a managed AWS service for key management and automatic rotation. Which AWS service should the company use to meet these requirements?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
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AWS CloudHSM
AWS CloudHSM provides dedicated hardware security modules (HSMs) for key storage, but it does not offer built-in automatic key rotation. Customers must build and manage their own rotation scripts, increasing operational overhead. It is not a fully managed key rotation service.
B
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AWS Certificate Manager (ACM)
AWS Certificate Manager is used to provision, manage, and deploy public and private SSL/TLS certificates. It does not manage encryption keys for Amazon EBS volumes or provide automatic key rotation for such encryption.
C
Best answer
AWS Key Management Service (AWS KMS)
AWS KMS is a fully managed service that enables you to create, control, and rotate customer-managed keys. It supports automatic annual key rotation for customer managed keys with a simple checkbox, and integrates seamlessly with Amazon EBS for encryption at rest, meeting the policy requirements with minimal overhead.
D
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AWS Secrets Manager
AWS Secrets Manager is designed to securely store, rotate, and manage secrets such as database credentials, API keys, and other sensitive information. It is not intended for managing encryption keys for EBS volumes, and it does not integrate with EBS encryption.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: AWS Key Management Service (AWS KMS) — AWS Key Management Service (AWS KMS) is the correct service because it provides a fully managed way to create, control, and automatically rotate customer-managed keys. KMS integrates directly with Amazon EBS to enforce encryption at rest, and automatic key rotation can be enabled with a single setting, requiring no custom scripting or manual intervention. AWS CloudHSM requires manual key rotation and is a dedicated hardware security module, not a fully managed key rotation service. AWS Certificate Manager (ACM) handles SSL/TLS certificates, not encryption keys for EBS. AWS Secrets Manager is designed for managing secrets such as database credentials, not for encryption keys used for EBS volume encryption.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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