- A
Set a bucket policy that requires MFA for any s3:DeleteObject action.
Why wrong: Incorrect. Requiring MFA for s3:DeleteObject adds security for deleting objects, but does not help recover objects if the bucket is deleted.
- B
Add a bucket policy that denies s3:DeleteBucket for all principals.
Why wrong: Incorrect. Denying s3:DeleteBucket can prevent bucket deletion but does not provide recovery if the bucket is accidentally deleted.
- C
Enable versioning on the bucket and enable MFA delete.
Why wrong: Incorrect. Versioning with MFA delete protects object versions within the bucket, but if the bucket itself is deleted, all objects and versions are lost.
- D
Enable cross-region replication on the bucket.
Correct. Cross-region replication replicates objects to another bucket in a different region. If the source bucket is deleted, the replicated objects remain in the destination bucket, allowing recovery.
How to Recover S3 Objects If the Bucket Is Deleted
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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. A key principle to apply: cross-Region Replication (CRR). 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's S3 bucket contains critical data. The bucket policy allows s3:PutObject and s3:GetObject for all authenticated users in the account. A SysOps administrator needs to ensure that if the bucket is accidentally deleted, the objects can be recovered. Which solution meets this requirement?
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
Enable cross-region replication on the bucket.
Option D is correct because cross-region replication (CRR) automatically replicates objects to a destination bucket in a different AWS Region. If the source bucket is accidentally deleted, the replicated objects remain in the destination bucket, allowing recovery. Versioning with MFA delete (Option C) protects against accidental deletion of object versions within the bucket but does not protect against deletion of the bucket itself; when the bucket is deleted, all objects and versions are permanently lost. Options A and B are incorrect: MFA for DeleteObject only adds a security control for deleting objects, not for bucket deletion; denying s3:DeleteBucket does prevent the bucket from being deleted but does not help recover objects if deletion occurs.
Key principle: Cross-Region Replication (CRR)
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set a bucket policy that requires MFA for any s3:DeleteObject action.
Why it's wrong here
Incorrect. Requiring MFA for s3:DeleteObject adds security for deleting objects, but does not help recover objects if the bucket is deleted.
- ✗
Add a bucket policy that denies s3:DeleteBucket for all principals.
Why it's wrong here
Incorrect. Denying s3:DeleteBucket can prevent bucket deletion but does not provide recovery if the bucket is accidentally deleted.
- ✗
Enable versioning on the bucket and enable MFA delete.
Why it's wrong here
Incorrect. Versioning with MFA delete protects object versions within the bucket, but if the bucket itself is deleted, all objects and versions are lost.
- ✓
Enable cross-region replication on the bucket.
Why this is correct
Correct. Cross-region replication replicates objects to another bucket in a different region. If the source bucket is deleted, the replicated objects remain in the destination bucket, allowing recovery.
Related concept
Cross-Region Replication (CRR)
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that candidates may think versioning with MFA delete protects against bucket deletion, but versioning only preserves object versions within the bucket. If the bucket itself is deleted, all objects (including all versions) are lost. Cross-region replication provides a separate copy of objects in another bucket, enabling recovery even if the original bucket is deleted.
Detailed technical explanation
How to think about this question
S3 versioning works by assigning a unique version ID to each object upload; when an object is deleted, S3 adds a delete marker instead of removing the object, and the previous versions remain accessible. MFA delete requires the user to present a valid MFA code (from a hardware or virtual MFA device) to permanently delete an object version or suspend versioning, which is enforced via the `x-amz-mfa` header in the request. This combination ensures that even if the bucket policy allows deletion, the objects can be recovered by removing the delete marker and restoring a previous version, provided the bucket itself is not deleted (bucket deletion is a separate action that versioning does not protect against).
KKey Concepts to Remember
- Cross-Region Replication (CRR)
- S3 Versioning
- MFA Delete
- Bucket Deletion
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
Cross-Region Replication (CRR)
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.
Review cross-Region Replication (CRR), then practise related SOA-C02 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Cross-Region Replication (CRR).
What is the correct answer to this question?
The correct answer is: Enable cross-region replication on the bucket. — Option D is correct because cross-region replication (CRR) automatically replicates objects to a destination bucket in a different AWS Region. If the source bucket is accidentally deleted, the replicated objects remain in the destination bucket, allowing recovery. Versioning with MFA delete (Option C) protects against accidental deletion of object versions within the bucket but does not protect against deletion of the bucket itself; when the bucket is deleted, all objects and versions are permanently lost. Options A and B are incorrect: MFA for DeleteObject only adds a security control for deleting objects, not for bucket deletion; denying s3:DeleteBucket does prevent the bucket from being deleted but does not help recover objects if deletion occurs.
What should I do if I get this SOA-C02 question wrong?
Review cross-Region Replication (CRR), then practise related SOA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Cross-Region Replication (CRR)
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Last reviewed: Jul 4, 2026
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