Q95 — AWS DVA-C02 Ch.3
Question 95 of 100 | ← Chapter 3
An IT department uses Amazon S3 to store sensitive images. After one year, the company moves images to archival storage. Although access to these images is infrequent, the IT department requires retrieval of archived images within 24 hours. Which solution provides the most cost-effective way to meet these requirements while maximizing reliability?
- A. Store images in S3 Standard-Infrequent Access (S3 Standard-IA). Use S3 Glacier Deep Archive with standard retrieval to store and retrieve archived images. ✓
- B. Store images in S3 Standard-Infrequent Access (S3 Standard-IA). Use S3 Glacier Deep Archive with bulk retrieval to store and retrieve archived images.
- C. Store images in S3 Intelligent-Tiering. Use S3 Glacier Deep Archive with standard retrieval to store and retrieve archived images.
- D. Store images in S3 One Zone-Infrequent Access (S3 One Zone-IA). Use S3 Glacier Deep Archive with bulk retrieval to store and retrieve archived images.
Correct Answer: A. Store images in S3 Standard-Infrequent Access (S3 Standard-IA). Use S3 Glacier Deep Archive with standard retrieval to store and retrieve archived images.
Explanation
Option A is correct. S3 Standard-IA is appropriate for infrequently accessed but still active data during the first year, offering lower cost than S3 Standard while maintaining high availability and durability. After one year, moving to S3 Glacier Deep Archive provides the lowest-cost archival storage. Standard retrieval from Glacier Deep Archive delivers objects within 12–48 hours—meeting the 24-hour requirement—and is more cost-effective than expedited retrieval. Option B’s bulk retrieval takes 48+ hours, violating the 24-hour SLA. Option C incorrectly attempts to use S3 Intelligent-Tiering (a tiering mechanism for frequently changing access patterns) alongside Glacier Deep Archive, which is invalid—objects cannot reside in two storage classes simultaneously. Option D uses S3 One Zone-IA, which stores data in a single Availability Zone and lacks the required durability for sensitive data, and also misapplies bulk retrieval. Thus, A is the most reliable and cost-effective solution.