AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question
An operations engineer must configure cross-Region replication for an existing Amazon S3 bucket that stores critical application logs. The replication must copy every object version, including overwrites and deletions, to a bucket in another Region. Which prerequisite must the engineer implement on both buckets before enabling the replication rule?
Enable S3 versioning on both the source and destination buckets.
Enable MFA Delete on the source bucket to protect object versions during replication.
Enable S3 versioning on the source bucket only; the destination bucket inherits versioning automatically.
Enable server-side encryption with AWS KMS keys on both buckets to track object versions.
S3 replication relies on the bucket's versioning feature. Versioning records each change as a distinct object version, allowing the replication service to propagate overwrites and delete markers to the destination bucket. AWS requires versioning to be enabled on both the source and destination buckets before a replication rule can be created. Enabling versioning only on the source bucket, configuring MFA Delete, or using SSE-KMS alone does not satisfy this mandatory prerequisite.
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Why is S3 versioning required for cross-Region replication?
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What happens if versioning is enabled only on the source or destination bucket?
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Does enabling versioning automatically replicate objects between buckets?
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AWS Certified CloudOps Engineer Associate SOA-C03
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