CLF-C02 Security and Compliance Practice Question
A healthcare company is subject to HIPAA regulations and must record all AWS API calls made in its account for auditing. The logs must be retained for 7 years and must be protected from any modification or deletion, including by the account root user. Which combination of AWS services should the company use to meet these requirements?
⚠ Common exam trap
A common mix-up: candidates confuse MFA Delete with S3 Object Lock, not realizing that MFA Delete can be bypassed by the root user who controls the MFA device, whereas compliance mode enforces a legal hold that even the root user cannot override.
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
✓
AWS CloudTrail with log file validation enabled, and store the log files in an Amazon S3 bucket with S3 Object Lock enabled in compliance mode
AWS CloudTrail with log file validation enabled ensures the integrity of the API call logs by using a digital signature (SHA-256 hash) to detect any tampering. Storing these logs in an Amazon S3 bucket with S3 Object Lock in compliance mode prevents any user, including the root user, from overwriting or deleting the objects for the specified retention period (7 years), meeting HIPAA's immutable audit log requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS CloudTrail with log file validation enabled, and store the log files in an Amazon S3 bucket with S3 Object Lock enabled in compliance mode
Why this is correct
CloudTrail records API calls, and log file validation provides integrity. S3 Object Lock in compliance mode prevents any user, including the root user, from deleting or modifying the log files for the retention period, satisfying the tamper-proof retention requirement.
- ✗
AWS Config with a HIPAA conformance pack, and store the configuration history in an Amazon S3 bucket with versioning enabled
Why it's wrong here
AWS Config tracks resource configuration changes, not API calls. While versioning helps protect against accidental overwrites, it does not prevent intentional deletion by authorized users. S3 Object Lock is required for strict write-once-read-many (WORM) compliance. Additionally, the HIPAA conformance pack is for evaluating configurations against HIPAA rules, not for recording API calls.
When this WOULD be correct
An organization needs to continuously monitor and record changes to AWS resource configurations for compliance with HIPAA, and must retain configuration history for 7 years with protection against modification or deletion. In that case, AWS Config with a conformance pack and S3 bucket with versioning would be appropriate.
- ✗
Amazon GuardDuty with findings exported to an Amazon S3 bucket, and enable MFA Delete on the bucket
Why it's wrong here
GuardDuty is a threat detection service that identifies suspicious activity; it does not record all API calls. MFA Delete requires multi-factor authentication to delete objects but does not block deletion by the root user who holds the MFA device. It is not sufficient for a strict 7-year retention requirement.
When this WOULD be correct
A company needs to detect and respond to suspicious API activity and protect findings from accidental deletion. GuardDuty with findings exported to S3 with MFA Delete would be correct if the requirement is for threat detection and basic deletion protection, not full API auditing or immutable retention.
- ✗
AWS CloudTrail with log file validation enabled, and store the log files in an Amazon S3 bucket with MFA Delete enabled
Why it's wrong here
While CloudTrail with log file validation is correct for recording API calls and ensuring integrity, MFA Delete does not provide the same level of protection as S3 Object Lock in compliance mode. The root user can still delete objects because they own the MFA device. S3 Object Lock in compliance mode is the only option that prevents any user (including root) from deleting objects.
When this WOULD be correct
A company needs to record AWS API calls for auditing and must protect the logs from accidental or unauthorized deletion, but does not require a fixed retention period or protection against modification. MFA Delete would be sufficient to prevent deletion unless the root user with MFA approves it.
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 CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓AWS CloudTrail with log file validation enabled, and store the log files in an Amazon S3 bucket with S3 Object Lock enabled in compliance modeCorrect answer▾
Why this is correct
CloudTrail records API calls, and log file validation provides integrity. S3 Object Lock in compliance mode prevents any user, including the root user, from deleting or modifying the log files for the retention period, satisfying the tamper-proof retention requirement.
✗AWS Config with a HIPAA conformance pack, and store the configuration history in an Amazon S3 bucket with versioning enabledWrong answer — click to see why▾
Why this is wrong here
AWS Config records resource configuration changes, not API calls. It does not meet the requirement to record all AWS API calls for auditing.
★ When this WOULD be the correct answer
An organization needs to continuously monitor and record changes to AWS resource configurations for compliance with HIPAA, and must retain configuration history for 7 years with protection against modification or deletion. In that case, AWS Config with a conformance pack and S3 bucket with versioning would be appropriate.
Why candidates choose this
Candidates may confuse AWS Config's configuration history with API call logging, or think that a HIPAA conformance pack automatically addresses all auditing requirements.
✗Amazon GuardDuty with findings exported to an Amazon S3 bucket, and enable MFA Delete on the bucketWrong answer — click to see why▾
Why this is wrong here
Amazon GuardDuty detects threats but does not record all AWS API calls for auditing; its findings are not a complete audit trail of API activity, and MFA Delete alone does not prevent deletion by the root user or provide the immutability required for 7-year retention under HIPAA.
★ When this WOULD be the correct answer
A company needs to detect and respond to suspicious API activity and protect findings from accidental deletion. GuardDuty with findings exported to S3 with MFA Delete would be correct if the requirement is for threat detection and basic deletion protection, not full API auditing or immutable retention.
Why candidates choose this
Candidates may confuse GuardDuty's threat detection with CloudTrail's API auditing, and MFA Delete seems like strong protection, but it does not prevent root user deletion or provide the compliance-mode immutability required for HIPAA.
✗AWS CloudTrail with log file validation enabled, and store the log files in an Amazon S3 bucket with MFA Delete enabledWrong answer — click to see why▾
Why this is wrong here
MFA Delete protects against accidental or unauthorized deletion but does not prevent modification of objects, nor does it enforce a retention period. HIPAA requires immutable logs for 7 years, which S3 Object Lock in compliance mode provides by preventing any deletion or modification, even by the root user.
★ When this WOULD be the correct answer
A company needs to record AWS API calls for auditing and must protect the logs from accidental or unauthorized deletion, but does not require a fixed retention period or protection against modification. MFA Delete would be sufficient to prevent deletion unless the root user with MFA approves it.
Why candidates choose this
Candidates may confuse MFA Delete with Object Lock, thinking that requiring multi-factor authentication for deletion provides sufficient protection. They might also overlook the need for immutability and a fixed retention period required by HIPAA.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services 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 CLF-C02 exam.