- A
Object Lock in Compliance mode with a 7-year retention period
Compliance mode prevents ALL users including root from deleting or overwriting objects before retention expires. The period cannot be shortened, satisfying strict financial regulatory requirements.
- B
Object Lock in Governance mode with a 7-year retention period
Why wrong: Governance mode can be bypassed by the root account and users with s3:BypassGovernanceRetention. This fails the requirement that no one including root can delete the logs.
- C
S3 Versioning with a lifecycle rule to transition objects to Glacier after 7 years
Why wrong: Versioning keeps prior versions but a privileged user can permanently delete all versions. Lifecycle rules change storage class — they do not provide immutability.
- D
A bucket policy with Deny for s3:DeleteObject applied to all principals including root
Why wrong: Bucket policies (IAM resource policies) cannot restrict the root account. Root is exempt from IAM policies. Only Object Lock Compliance mode can prevent root from deleting S3 objects.
SAA-C03 Practice Question: S3 Object Lock Compliance mode prevents deletion…
This SAA-C03 practice question tests your understanding of design secure architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: s3 Object Lock Compliance mode prevents deletion by ALL users including root. 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 financial services company must store audit logs in S3 for 7 years and ensure that no one — including the AWS account root user — can delete or overwrite the logs during the retention period. Which S3 Object Lock configuration should a solutions architect use?
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
Object Lock in Compliance mode with a 7-year retention period
S3 Object Lock in Compliance mode prevents ALL users — including the root account — from deleting or overwriting objects before the retention period expires. The retention period itself cannot be shortened once set in Compliance mode. Governance mode also prevents most deletions, but users with s3:BypassGovernanceRetention permission (and the root account) can delete objects or shorten the retention period. For regulatory requirements where not even root can override, Compliance mode is mandatory.
Key principle: S3 Object Lock Compliance mode prevents deletion by ALL users including root
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Object Lock in Compliance mode with a 7-year retention period
Why this is correct
Compliance mode prevents ALL users including root from deleting or overwriting objects before retention expires. The period cannot be shortened, satisfying strict financial regulatory requirements.
Related concept
S3 Object Lock Compliance mode prevents deletion by ALL users including root
- ✗
Object Lock in Governance mode with a 7-year retention period
Why it's wrong here
Governance mode can be bypassed by the root account and users with s3:BypassGovernanceRetention. This fails the requirement that no one including root can delete the logs.
- ✗
S3 Versioning with a lifecycle rule to transition objects to Glacier after 7 years
Why it's wrong here
Versioning keeps prior versions but a privileged user can permanently delete all versions. Lifecycle rules change storage class — they do not provide immutability.
- ✗
A bucket policy with Deny for s3:DeleteObject applied to all principals including root
Why it's wrong here
Bucket policies (IAM resource policies) cannot restrict the root account. Root is exempt from IAM policies. Only Object Lock Compliance mode can prevent root from deleting S3 objects.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates choose Governance mode because 'governance' sounds strict. In AWS terminology, Governance is the LESS strict option — it can be bypassed by privileged users. Compliance mode is immutable: no one can remove the retention until the period expires. This distinction is critical for financial regulations like SEC Rule 17a-4 and FINRA requirements.
Detailed technical explanation
How to think about this question
S3 Object Lock mode comparison: - Compliance mode: Not even root can delete/overwrite before retention expires. Retention cannot be shortened. Required for strict regulatory WORM. - Governance mode: Users with s3:BypassGovernanceRetention permission and root can override. Retention can be shortened. Use when admin escape hatch is needed. - Legal Hold: Indefinite lock on individual objects, overrides retention date. Independent of mode. Important: Object Lock must be enabled at bucket creation time. It cannot be enabled retroactively. Versioning is required and is enabled automatically when Object Lock is enabled.
KKey Concepts to Remember
- S3 Object Lock Compliance mode prevents deletion by ALL users including root
- S3 Object Lock Governance mode can be overridden by users with s3:BypassGovernanceRetention and root
- Object Lock must be enabled at bucket creation — cannot be added retroactively
- Compliance mode is required for SEC Rule 17a-4, FINRA, and similar financial regulations
- Legal Holds provide indefinite object-level protection independent of retention period
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
S3 Object Lock Compliance mode prevents deletion by ALL users including root
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
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — S3 Object Lock Compliance mode prevents deletion by ALL users including root.
What is the correct answer to this question?
The correct answer is: Object Lock in Compliance mode with a 7-year retention period — S3 Object Lock in Compliance mode prevents ALL users — including the root account — from deleting or overwriting objects before the retention period expires. The retention period itself cannot be shortened once set in Compliance mode. Governance mode also prevents most deletions, but users with s3:BypassGovernanceRetention permission (and the root account) can delete objects or shorten the retention period. For regulatory requirements where not even root can override, Compliance mode is mandatory.
What should I do if I get this SAA-C03 question wrong?
Review s3 Object Lock Compliance mode prevents deletion by ALL users including root, then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 Object Lock Compliance mode prevents deletion by ALL users including root
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Last reviewed: May 17, 2026
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