- A
Helps meet regulatory requirements for write-once-read-many (WORM) storage.
Object Lock supports compliance and governance modes.
- B
Encrypts objects at rest using AWS KMS.
Why wrong: Encryption is separate from Object Lock.
- C
Prevents objects from being deleted or overwritten for a fixed time.
Object Lock enforces retention.
- D
Automatically transitions objects to lower-cost storage classes.
Why wrong: Lifecycle policies handle transitions.
- E
Enables automatic versioning of objects.
Why wrong: Versioning is a separate S3 feature.
Question 1,119 of 1,786
S3 Object Lock — WORM Storage Benefits
This DEA-C01 practice question tests your understanding of data store management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 TWO are benefits of using Amazon S3 Object Lock? (Choose TWO.)
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
✓
Helps meet regulatory requirements for write-once-read-many (WORM) storage.
Amazon S3 Object Lock helps meet regulatory requirements for write-once-read-many (WORM) storage by allowing you to set retention periods and legal holds on objects. This ensures that data cannot be deleted or overwritten for a specified duration, which is a common requirement for compliance frameworks such as SEC Rule 17a-4 or FINRA.
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.
- ✓
Helps meet regulatory requirements for write-once-read-many (WORM) storage.
Why this is correct
Object Lock supports compliance and governance modes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Encrypts objects at rest using AWS KMS.
Why it's wrong here
Encryption is separate from Object Lock.
- ✓
Prevents objects from being deleted or overwritten for a fixed time.
Why this is correct
Object Lock enforces retention.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Automatically transitions objects to lower-cost storage classes.
Why it's wrong here
Lifecycle policies handle transitions.
- ✗
Enables automatic versioning of objects.
Why it's wrong here
Versioning is a separate S3 feature.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse S3 Object Lock with S3 Versioning or S3 Lifecycle policies, mistakenly thinking Object Lock handles encryption or storage tier transitions, when in reality it is solely focused on preventing object deletion or overwrite for compliance-driven WORM scenarios.
Detailed technical explanation
How to think about this question
S3 Object Lock works by applying either a retention period (with Governance or Compliance mode) or a legal hold to individual object versions. In Compliance mode, the retention period cannot be shortened or removed by any user, including the root user, providing a true WORM guarantee. Legal holds function independently of retention periods and can be added or removed only by users with the s3:PutObjectLegalHold permission, offering flexible protection for legal or investigative purposes.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Helps meet regulatory requirements for write-once-read-many (WORM) storage. — Amazon S3 Object Lock helps meet regulatory requirements for write-once-read-many (WORM) storage by allowing you to set retention periods and legal holds on objects. This ensures that data cannot be deleted or overwritten for a specified duration, which is a common requirement for compliance frameworks such as SEC Rule 17a-4 or FINRA.
What should I do if I get this DEA-C01 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
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