The correct choice is S3 Object Lock, because it enforces a write-once-read-many (WORM) model that prevents objects from being deleted or overwritten for a specified period, directly meeting regulatory compliance requirements. This feature applies retention modes—Governance or Compliance—or legal holds to block both DELETE and PUT operations on locked objects until the retention period expires, ensuring data immutability. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of S3’s compliance capabilities, often appearing alongside scenarios about regulatory mandates like SEC Rule 17a-4. A common trap is confusing S3 Object Lock with S3 Versioning or MFA Delete; remember that Versioning tracks changes but does not prevent them, while Object Lock enforces strict WORM controls. For a quick memory tip, think “Lock it, don’t drop it”—Object Lock locks objects to prevent deletion or overwrites for compliance.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. 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 company wants to use Amazon S3 to store objects that must not be deleted or overwritten for a specified period for regulatory compliance. Which S3 feature enforces this?
Why wrong: Versioning preserves object history but doesn't prevent deletion of versions — MFA Delete adds protection but Object Lock is the WORM compliance feature.
B
S3 Lifecycle policies
Why wrong: Lifecycle policies automate transitions and expiration — they can delete objects, which is the opposite of WORM protection.
C
S3 Object Lock
Object Lock enforces WORM storage with Governance or Compliance retention modes — Compliance mode is immutable even to root users, satisfying strict regulatory requirements.
D
S3 Block Public Access
Why wrong: Block Public Access prevents public exposure — it doesn't prevent authorized users from deleting objects.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
S3 Object Lock
Amazon S3 Object Lock is designed specifically to prevent objects from being deleted or overwritten for a fixed period or indefinitely. It enforces a write-once-read-many (WORM) model by applying retention modes (Governance or Compliance) or legal holds, which block both DELETE and PUT operations on locked objects until the retention period expires. This directly meets the regulatory compliance requirement described in the question.
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 Versioning
Why it's wrong here
Versioning preserves object history but doesn't prevent deletion of versions — MFA Delete adds protection but Object Lock is the WORM compliance feature.
✗
S3 Lifecycle policies
Why it's wrong here
Lifecycle policies automate transitions and expiration — they can delete objects, which is the opposite of WORM protection.
✓
S3 Object Lock
Why this is correct
Object Lock enforces WORM storage with Governance or Compliance retention modes — Compliance mode is immutable even to root users, satisfying strict regulatory requirements.
Related concept
Read the scenario before looking for a memorised answer.
✗
S3 Block Public Access
Why it's wrong here
Block Public Access prevents public exposure — it doesn't prevent authorized users from deleting objects.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 Versioning with immutability, assuming that keeping multiple versions prevents deletion, but versioning alone does not block the ability to delete the latest version or permanently delete all versions.
Detailed technical explanation
How to think about this question
S3 Object Lock works by storing retention settings as object metadata, and the S3 API checks these settings before processing any DELETE or PUT request. In Compliance mode, even the root user cannot delete or overwrite the object until the retention date passes, while Governance mode allows users with the s3:BypassGovernanceRetention permission to override. A real-world scenario is financial institutions storing audit logs that must remain immutable for 7 years under SEC Rule 17a-4, where Object Lock with Compliance mode is used to meet that regulatory requirement.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CLF-C02 question in full detail.
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Object Lock — Amazon S3 Object Lock is designed specifically to prevent objects from being deleted or overwritten for a fixed period or indefinitely. It enforces a write-once-read-many (WORM) model by applying retention modes (Governance or Compliance) or legal holds, which block both DELETE and PUT operations on locked objects until the retention period expires. This directly meets the regulatory compliance requirement described in the question.
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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Question Discussion
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