- A
An EBS snapshot schedule
Why wrong: EBS snapshots do not apply to S3 objects.
- B
S3 Cross-Region Replication with versioning enabled
CRR asynchronously replicates objects to a bucket in another Region and requires versioning.
- C
S3 lifecycle transition to Glacier Flexible Retrieval
Why wrong: Lifecycle transition changes storage class, not Region.
- D
A CloudFront distribution
Why wrong: CloudFront caches content but is not a durable DR copy.
Question 365 of 1,040
Configuring S3 Cross-Region Replication with Versioning for DR
This SAA-C03 practice question tests your understanding of design resilient architectures. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: s3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.. 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 trading dashboard stores uploaded documents in S3. The business requires a copy in another AWS Region for disaster recovery. What should be configured? The architecture review board prefers a managed AWS-native control.
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
✓
S3 Cross-Region Replication with versioning enabled
S3 Cross-Region Replication (CRR) is the correct AWS-native managed solution for automatically replicating objects from a source S3 bucket in one region to a destination bucket in another region, meeting the disaster recovery requirement. Versioning must be enabled on both source and destination buckets for CRR to function, as replication relies on version IDs to track and copy objects. This provides asynchronous, automatic replication without custom scripting or third-party tools.
Key principle: S3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
An EBS snapshot schedule
Why it's wrong here
EBS snapshots do not apply to S3 objects.
- ✓
S3 Cross-Region Replication with versioning enabled
Why this is correct
CRR asynchronously replicates objects to a bucket in another Region and requires versioning.
Related concept
S3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.
- ✗
S3 lifecycle transition to Glacier Flexible Retrieval
Why it's wrong here
Lifecycle transition changes storage class, not Region.
- ✗
A CloudFront distribution
Why it's wrong here
CloudFront caches content but is not a durable DR copy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse S3 lifecycle policies (which only manage storage tiers within a region) with cross-region replication, or incorrectly assume CloudFront's global edge caching provides durable DR storage in another region.
Detailed technical explanation
How to think about this question
S3 CRR uses the source bucket's replication configuration, which includes a destination bucket ARN, an IAM role for cross-account access (if needed), and optional filters (e.g., prefix or tags). Replication is asynchronous and typically completes within 15 minutes, but can be slower for large objects; S3 RTC (Replication Time Control) can guarantee replication within 15 minutes for a fee. A subtle behavior: if you enable CRR on an existing bucket, only new objects are replicated by default—existing objects require a batch operation or manual copy.
KKey Concepts to Remember
- S3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.
- CRR requires S3 Versioning to be enabled on both the source and destination buckets.
- CRR is a managed, AWS-native service for disaster recovery and compliance.
- CRR replicates new objects, object updates, and delete markers.
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 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.
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 s3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions., then practise related SAA-C03 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Resilient Architectures — This question tests Design Resilient Architectures — S3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions..
What is the correct answer to this question?
The correct answer is: S3 Cross-Region Replication with versioning enabled — S3 Cross-Region Replication (CRR) is the correct AWS-native managed solution for automatically replicating objects from a source S3 bucket in one region to a destination bucket in another region, meeting the disaster recovery requirement. Versioning must be enabled on both source and destination buckets for CRR to function, as replication relies on version IDs to track and copy objects. This provides asynchronous, automatic replication without custom scripting or third-party tools.
What should I do if I get this SAA-C03 question wrong?
Review s3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 Cross-Region Replication (CRR) asynchronously copies objects between S3 buckets in different AWS Regions.
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Same concept, more angles
3 more ways this is tested on SAA-C03
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A trading dashboard stores uploaded documents in S3. The business requires a copy in another AWS Region for disaster recovery. What should be configured?
medium- A.An EBS snapshot schedule
- ✓ B.S3 Cross-Region Replication with versioning enabled
- C.S3 lifecycle transition to Glacier Flexible Retrieval
- D.A CloudFront distribution
Why B: S3 Cross-Region Replication (CRR) with versioning enabled automatically replicates objects to a destination bucket in a different AWS Region, providing a durable, low-latency disaster recovery copy. Versioning must be enabled on both source and destination buckets to track object changes and ensure consistency during replication. This meets the requirement for a cross-region copy without manual intervention.
Variation 2. A trading dashboard stores uploaded documents in S3. The business requires a copy in another AWS Region for disaster recovery. What should be configured? The design must avoid adding custom operational scripts.
medium- A.An EBS snapshot schedule
- ✓ B.S3 Cross-Region Replication with versioning enabled
- C.S3 lifecycle transition to Glacier Flexible Retrieval
- D.A CloudFront distribution
Why B: S3 Cross-Region Replication (CRR) automatically replicates objects to a destination bucket in a different AWS Region, meeting the disaster recovery requirement without custom scripts. Versioning must be enabled on both source and destination buckets for CRR to function, as it tracks object versions and ensures consistency during replication.
Variation 3. A trading dashboard stores uploaded documents in S3. The business requires a copy in another AWS Region for disaster recovery. What should be configured? The team wants the control to be enforceable during normal operations.
medium- A.An EBS snapshot schedule
- ✓ B.S3 Cross-Region Replication with versioning enabled
- C.S3 lifecycle transition to Glacier Flexible Retrieval
- D.A CloudFront distribution
Why B: S3 Cross-Region Replication (CRR) automatically replicates objects to a destination bucket in a different AWS Region, providing a disaster recovery copy. Enabling versioning on both source and destination buckets is required for CRR to function, and replication can be enforced during normal operations by applying an IAM policy that denies `s3:PutObject` unless the request includes the `x-amz-server-side-encryption` header or by using a bucket policy that requires replication. This meets the business requirement for an enforceable, automated DR copy.
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Last reviewed: Jun 11, 2026
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