SOA-C03 practice question: Restores, versioning, RPO and RTO (2 of 2)

Reliability and Business Continuity A free question from our original SOA-C03 practice exam. Try it, then open the answer to see why each option is right or wrong.

A ski resort keeps trail maps and lift-status images in an S3 bucket that has S3 Versioning turned on. A cleanup script mistakenly ran a simple DELETE request, without a version ID, against 3,000 current objects. The website now returns 404 errors for those images. What is the quickest way for a CloudOps engineer to bring the objects back?

Choose one answer.

A. Delete the delete markers that the script created, so that the previous versions become the current versions again.
B. Restore the objects from the bucket's S3 Glacier archive tier, which keeps a copy of every object for 30 days after deletion.
C. Turn on S3 Object Lock for the bucket and roll the objects back to the last locked state in governance mode.
D. Open a support case to ask AWS to recover the deleted objects from the bucket's internal backups.

Show the answer and explanation

Answer: A

A. Right: Correct. In a versioned bucket, a DELETE without a version ID only adds a delete marker. Removing the marker makes the most recent earlier version current again, with no data copied. Learn more: Working with delete markers (opens in a new tab)
B. Wrong: S3 does not keep a hidden archive copy of deleted objects. Earlier versions stay in the bucket itself because versioning is on. Learn more: Understanding and managing Amazon S3 storage classes (opens in a new tab)
C. Wrong: Object Lock prevents future deletions or overwrites for a retention period. It has no rollback feature and does not restore objects that were already deleted. Learn more: Locking objects with Object Lock (opens in a new tab)
D. Wrong: AWS does not restore deleted objects from internal backups. With versioning on, the previous versions are still in the bucket, so the team can recover them itself. Learn more: Restoring previous versions (opens in a new tab)

Explanation

S3 Versioning protects against accidental deletes. A simple DELETE places a delete marker on top of the object, and the earlier versions remain. Deleting the marker restores access to the previous version, so the fix takes minutes and copies no data.

SOA-C03 practice question: Restores, versioning, RPO and RTO (2 of 2)

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