A company stores critical backup files in an Amazon S3 bucket in the eu-west-1 region. For disaster recovery compliance, these files must be automatically copied to an S3 bucket in the us-east-1 region. What is the MOST operationally efficient solution?

Answer options:

Create a Lambda function triggered by S3 events to copy the files.

Use AWS DataSync to schedule daily transfers between the buckets.

Enable S3 Cross-Region Replication (CRR).

Use S3 Batch Operations to copy the files weekly.

How to approach this question

Identify the need for automatic cross-region S3 copying. CRR is the native, zero-maintenance feature.

Full Answer

C.Enable S3 Cross-Region Replication (CRR).✓ Correct

Enable S3 Cross-Region Replication (CRR).

S3 Cross-Region Replication (CRR) automatically and asynchronously copies objects across buckets in different AWS Regions. It requires versioning to be enabled on both buckets and is the most efficient way to meet DR compliance.

Common mistakes

Overcomplicating the solution with Lambda or DataSync.

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