- A
Enable S3 Standard storage class on the bucket.
Why wrong: Incorrect: S3 Standard does not provide automatic cross-region replication.
- B
Use S3 One Zone-IA storage class.
Why wrong: Incorrect: One Zone-IA stores objects in a single AZ and does not replicate.
- C
Configure S3 Cross-Region Replication.
Correct: S3 CRR automatically replicates objects to a destination bucket in another Region.
- D
Enable S3 Versioning on the bucket.
Why wrong: Incorrect: Versioning is a prerequisite for CRR but does not replicate objects by itself.
Question 454 of 1,546
Using S3 Cross-Region Replication for Automatic Object Replication Across Regions
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. 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 stores critical data in an S3 bucket. To ensure data durability and availability, the company wants to automatically replicate objects to a bucket in a different AWS Region. Which S3 feature should be used?
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
✓
Configure S3 Cross-Region Replication.
S3 Cross-Region Replication (CRR) is the correct feature because it automatically and asynchronously replicates objects from a source S3 bucket in one AWS Region to a destination bucket in a different AWS Region. This ensures data durability and availability by maintaining a copy in a separate geographic location, meeting the requirement for cross-region replication. CRR requires versioning to be enabled on both source and destination buckets.
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.
- ✗
Enable S3 Standard storage class on the bucket.
Why it's wrong here
Incorrect: S3 Standard does not provide automatic cross-region replication.
- ✗
Use S3 One Zone-IA storage class.
Why it's wrong here
Incorrect: One Zone-IA stores objects in a single AZ and does not replicate.
- ✓
Configure S3 Cross-Region Replication.
Why this is correct
Correct: S3 CRR automatically replicates objects to a destination bucket in another Region.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable S3 Versioning on the bucket.
Why it's wrong here
Incorrect: Versioning is a prerequisite for CRR but does not replicate objects by itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse enabling S3 Versioning (which is a prerequisite for CRR but does not itself replicate data) with the actual replication feature, leading them to select Option D instead of the correct CRR option.
Detailed technical explanation
How to think about this question
S3 Cross-Region Replication operates asynchronously, meaning that after an object is uploaded to the source bucket, it is replicated to the destination bucket within a matter of seconds to minutes, depending on object size and network conditions. Replication is configured via a replication rule in the source bucket's management settings, which requires IAM roles with appropriate permissions (e.g., s3:ReplicateObject, s3:ReplicateDelete) and versioning enabled on both buckets. A subtle behavior is that CRR does not replicate existing objects by default unless you use S3 Batch Replication, and it does not replicate objects encrypted with customer-provided encryption keys (SSE-C) unless explicitly configured.
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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Reliability and Business Continuity — study guide chapter
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure S3 Cross-Region Replication. — S3 Cross-Region Replication (CRR) is the correct feature because it automatically and asynchronously replicates objects from a source S3 bucket in one AWS Region to a destination bucket in a different AWS Region. This ensures data durability and availability by maintaining a copy in a separate geographic location, meeting the requirement for cross-region replication. CRR requires versioning to be enabled on both source and destination buckets.
What should I do if I get this SOA-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: Jul 4, 2026
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