SOA-C02 · Question #596
A SysOps administrator needs to optimize a company's Amazon S3 storage costs. The company has a mobile app that uses the S3 Standard storage class to store images. Users access the images frequently…
The correct answer is C. S3 Standard-Infrequent Access (S3 Standard-IA). S3 Standard-IA (C) is correct because it's designed exactly for infrequently accessed data that still requires immediate (millisecond) retrieval and high availability (99.9% availability, stored across multiple AZs) - making it a cost-effective drop-in after the first week of…
Question
A SysOps administrator needs to optimize a company's Amazon S3 storage costs. The company has a mobile app that uses the S3 Standard storage class to store images. Users access the images frequently for a week. After a week, users rarely access the images. The images must be highly available and must be immediately accessible upon request. The SysOps administrator is creating an S3 Lifecycle policy to move the images to a different storage class after 7 days. Which storage class will meet these requirements?
Options
- AGlacier Deep Archive
- BS3 Glacier Flexible Retrieval
- CS3 Standard-Infrequent Access (S3 Standard-IA)
- DS3 One Zone-Infrequent Access (S3 One Zone-IA)
How the community answered
(34 responses)- A12% (4)
- B6% (2)
- C79% (27)
- D3% (1)
Explanation
S3 Standard-IA (C) is correct because it's designed exactly for infrequently accessed data that still requires immediate (millisecond) retrieval and high availability (99.9% availability, stored across multiple AZs) - making it a cost-effective drop-in after the first week of frequent access.
Why the others fail:
- A (Glacier Deep Archive) has retrieval times of 12–48 hours - far from "immediately accessible," and is meant for long-term archival data accessed maybe once or twice a year.
- B (S3 Glacier Flexible Retrieval) retrieval takes minutes to hours, violating the "immediately accessible" requirement.
- D (S3 One Zone-IA) stores data in only a single Availability Zone, so it does not meet the "highly available" requirement - if that AZ goes down, your data is unavailable.
Memory tip: The word "Standard" in S3 Standard-IA signals multi-AZ high availability (just like S3 Standard), while "IA" signals lower cost for infrequent access with instant retrieval. If a question demands both high availability and immediate access for rarely-used data, Standard-IA is almost always the answer over One Zone-IA or any Glacier tier.
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