- A
S3 Block Public Access
Why wrong: Block Public Access prevents public exposure of S3 data — it doesn't specifically protect versioned objects from permanent deletion.
- B
S3 Object Lock
Why wrong: Object Lock implements WORM (Write Once Read Many) for compliance retention — S3 MFA Delete specifically requires MFA for version deletion, which is different from Object Lock's retention period enforcement.
- C
S3 MFA Delete
MFA Delete requires a valid MFA code to permanently delete versioned objects or suspend versioning, providing an additional layer of protection against accidental or unauthorized permanent deletion.
- D
S3 Access Points
Why wrong: Access Points simplify access management for shared datasets — they don't provide MFA-based protection for version deletion.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. 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.
Which AWS feature protects S3 buckets from having their versioned objects permanently deleted without multi-factor authentication approval?
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
S3 MFA Delete
S3 MFA Delete is the correct answer because it is the specific S3 versioning feature that requires multi-factor authentication (MFA) to permanently delete versioned objects or suspend versioning on a bucket. When enabled, any DeleteObject request that includes a version ID (permanent delete) or a PUT request to suspend versioning must include the x-amz-mfa header with a valid MFA code from a hardware or virtual MFA device. This prevents unauthorized or accidental permanent deletion of object versions, even by users with full S3 permissions.
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.
- ✗
S3 Block Public Access
Why it's wrong here
Block Public Access prevents public exposure of S3 data — it doesn't specifically protect versioned objects from permanent deletion.
- ✗
S3 Object Lock
Why it's wrong here
Object Lock implements WORM (Write Once Read Many) for compliance retention — S3 MFA Delete specifically requires MFA for version deletion, which is different from Object Lock's retention period enforcement.
- ✓
S3 MFA Delete
Why this is correct
MFA Delete requires a valid MFA code to permanently delete versioned objects or suspend versioning, providing an additional layer of protection against accidental or unauthorized permanent deletion.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Access Points
Why it's wrong here
Access Points simplify access management for shared datasets — they don't provide MFA-based protection for version deletion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 Object Lock's WORM protection with MFA Delete, but Object Lock prevents deletion based on time-based retention, not by requiring a second authentication factor, while MFA Delete specifically mandates MFA approval for permanent deletion of versioned objects.
Detailed technical explanation
How to think about this question
Under the hood, S3 MFA Delete is enabled at the bucket level via the VersioningConfiguration API by setting the MfaDelete element to 'Enabled'. Once enabled, any operation that permanently deletes a versioned object (specifying a version ID) or suspends versioning must include the x-amz-mfa header with the serial number of the MFA device and a valid six-digit code. Note that MFA Delete cannot be enabled or disabled via the AWS Management Console; it must be configured using the AWS CLI, SDK, or REST API, and the user performing the change must have the s3:PutBucketVersioning permission with MFA. A real-world scenario is a critical data lake where accidental permanent deletion of historical versions could cause compliance violations—MFA Delete adds a physical authentication factor to prevent such incidents.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
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.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 MFA Delete — S3 MFA Delete is the correct answer because it is the specific S3 versioning feature that requires multi-factor authentication (MFA) to permanently delete versioned objects or suspend versioning on a bucket. When enabled, any DeleteObject request that includes a version ID (permanent delete) or a PUT request to suspend versioning must include the x-amz-mfa header with a valid MFA code from a hardware or virtual MFA device. This prevents unauthorized or accidental permanent deletion of object versions, even by users with full S3 permissions.
What should I do if I get this CLF-C02 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: Jun 11, 2026
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.
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