An application uses Amazon S3 to store millions of images. The company wants to ensure that if objects are accidentally deleted or overwritten in the primary region (us-east-1), they can be recovered from a secondary region (us-west-2). The solution must minimize operational overhead.

Answer options:

Use AWS DataSync to sync the buckets hourly.

Enable S3 Versioning on both buckets. Configure S3 Cross-Region Replication (CRR) from us-east-1 to us-west-2.

Configure an S3 Event Notification to trigger a Lambda function that copies objects to the secondary region.

Enable S3 Object Lock in Governance mode on the primary bucket.

How to approach this question

Combine Versioning (for accidental deletion/overwrite) with CRR (for cross-region).

Full Answer

B.Enable S3 Versioning on both buckets. Configure S3 Cross-Region Replication (CRR) from us-east-1 to us-west-2.✓ Correct

Enable S3 Versioning on both buckets. Configure S3 Cross-Region Replication (CRR) from us-east-1 to us-west-2.

S3 Cross-Region Replication automatically replicates data across regions. S3 Versioning (required for CRR) allows recovery from accidental overwrites or deletes.

Common mistakes

Thinking CRR alone protects against deletes (delete markers are not replicated by default).

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