Q56 — AWS SAA-C03 Ch.17

Question 56 of 89 | ← Chapter 17

Q1356. A company is storing data that will not be frequently accessed in the AWS Cloud. If the company needs to access the data, the data needs to be retrieved within 12 hours. The company wants a solution that is cost- effective for storage costs for each gigabyte.Which Amazon S3 storage class will meet these requirements?

Correct Answer: B. S3 Glacier Flexible Retrieval

Explanation

The correct answer is B. S3 Glacier Flexible Retrieval.Explanation:The requirements are:Data is infrequently accessed (low access frequency).Retrieval within 12 hours when needed.Cost-effective storage per GB (lowest possible cost for long-term, infrequently accessed data).Why S3 Glacier Flexible Retrieval is correct:Designed for long-term, infrequently accessed data (e.g., backups, archives). Lowest storage cost among S3 options (cheaper than Standard-IA and One Zone-IA). Retrieval time of minutes to hours (supports expedited (1-5 minutes), standard (3-5 hours), or bulk (5-12 hours) retrieval).Meets the 12-hour retrieval requirement (using standard or bulk retrieval).Why the other options are incorrect:A. S3 StandardIncorrect:Highest cost per GB (not cost-effective for infrequently accessed data). Designed for frequently accessed data (low latency, high throughput).C. S3 One Zone-Infrequent Access (S3 One Zone-IA)Incorrect:Lower cost than S3 Standard but higher than Glacier Flexible Retrieval. Data is stored in a single AZ (not resilient to AZ failures). Retrieval is faster (milliseconds to hours), but more expensive than Glacier for long-term storage.D. S3 Standard-Infrequent Access (S3 Standard-IA)Incorrect:Lower cost than S3 Standard but higher than Glacier Flexible Retrieval. Designed for data accessed less frequently but requiring rapid access (milliseconds retrieval). Not cost-effective for data that can tolerate hours-long retrieval times.Key Considerations:Storage Cost vs. Retrieval Time Trade-off:Glacier Flexible Retrieval offers the lowest storage cost but slower retrieval (minutes to hours). Standard-IA/One Zone-IA provide faster retrieval (milliseconds to hours) but at a higher cost. S3 Standard is for frequently accessed data (highest cost, lowest latency).Retrieval Time Requirement (12 hours):Glacier Flexible Retrieval's bulk retrieval (5-12 hours) fits perfectly. Standard-IA/One Zone-IA would be overkill (faster than needed, more expensive).Data Durability & Availability:Glacier Flexible Retrieval stores data across multiple AZs (high durability). One Zone-IA stores data in a single AZ (lower durability, but cheaper).Correct Choice:S3 Glacier Flexible Retrieval is the most cost-effective for infrequently accessed data with a 12-hour retrieval window.Conclusion:Option B (S3 Glacier Flexible Retrieval) is the best fit because it:Minimizes storage costs per GB.Supports retrieval within 12 hours.Is designed for long-term archival.The other options are either too expensive (Standard, Standard-IA, One Zone-IA) or do not meet the retrieval time requirement (if choosing a slower Glacier variant like Deep Archive).