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Question 1
Which S3 storage class is designed for data that is accessed less than once a month and requires millisecond retrieval, but charges a retrieval fee?
Answer: S3 Standard-IA (Infrequent Access). It offers low per-GB storage cost with millisecond access but charges a per-GB retrieval fee and has a 30-day minimum storage duration.
Question 2
What is the minimum storage duration charge for objects stored in S3 Glacier Flexible Retrieval?
Answer: 90 days. Objects deleted, overwritten, or transitioned before 90 days incur a pro-rated charge for the remaining days.
Question 3
Which S3 storage class automatically moves objects between access tiers based on changing access patterns with no retrieval fees?
Answer: S3 Intelligent-Tiering. It monitors access patterns and moves objects between frequent, infrequent, and archive tiers automatically, charging a small monthly monitoring fee per object.
Question 4
What key tradeoff does S3 One Zone-IA have compared to S3 Standard-IA?
Answer: S3 One Zone-IA stores data in only one Availability Zone, making it 20% cheaper than Standard-IA but vulnerable to data loss if that AZ is destroyed. Standard-IA replicates across a minimum of three AZs.
Question 5
Which S3 Glacier retrieval option provides access to archived data within 1–5 minutes?
Answer: Expedited retrieval in S3 Glacier Flexible Retrieval. It is the fastest option but the most expensive, suitable for urgent small archive requests.