S3 & Storage

Correct answer: D. S3 Glacier Deep Archive

S3 Glacier Deep Archive is the lowest-cost storage class in S3 and is designed exactly for long-term retention of data accessed perhaps once or twice a year. Its standard retrieval completes within 12 hours, which matches the auditors' tolerance precisely. Glacier Flexible Retrieval restores faster but costs more per GB stored, so paying for speed the hospital does not need wastes money over a 10-year horizon. Standard-IA suits data needing millisecond access at infrequent intervals, and S3 Standard suits frequently accessed data; both are far more expensive for a decade-long archive. On the exam, match the stated retrieval tolerance to the cheapest class that satisfies it.

Source: AWS S3 docs: Amazon S3 storage classes — Glacier Deep Archive retrieval times

Correct answer: B. Suspend versioning; existing versions are kept and new uploads stop creating versions

Once versioning has been enabled on a bucket, the bucket can never return to the unversioned state. The only available change is to suspend versioning. Suspension preserves every existing object version exactly as it is, and from that point new uploads receive a null version ID instead of stacking new versions. Nothing is deleted automatically, so option A describes behaviour that does not exist and would be dangerous if it did. Emptying the bucket does not unlock a disable option either. Option D overstates the restriction, since suspension is a real state change. The exam frequently tests this exact enabled-versus-suspended distinction.

Source: AWS S3 docs: Using versioning in S3 buckets — versioning states