AWS Certified Data Engineer – Associate (DEA-C01) — Question 33
A company currently stores all of its data in Amazon S3 by using the S3 Standard storage class.
A data engineer examined data access patterns to identify trends. During the first 6 months, most data files are accessed several times each day. Between 6 months and 2 years, most data files are accessed once or twice each month. After 2 years, data files are accessed only once or twice each year.
The data engineer needs to use an S3 Lifecycle policy to develop new data storage rules. The new storage solution must continue to provide high availability.
Which solution will meet these requirements in the MOST cost-effective way?
Answer options
- A. Transition objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 6 months. Transfer objects to S3 Glacier Flexible Retrieval after 2 years.
- B. Transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 6 months. Transfer objects to S3 Glacier Flexible Retrieval after 2 years.
- C. Transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 6 months. Transfer objects to S3 Glacier Deep Archive after 2 years.
- D. Transition objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 6 months. Transfer objects to S3 Glacier Deep Archive after 2 years.
Correct answer: C
Explanation
The correct answer is C because transitioning to S3 Standard-IA after 6 months allows for cost savings while maintaining accessibility, and moving to S3 Glacier Deep Archive after 2 years provides a highly cost-effective long-term storage solution for infrequently accessed data. Options A and D use S3 One Zone-IA, which does not provide the same durability and availability as S3 Standard-IA, making them less suitable. Option B suggests Glacier Flexible Retrieval, which is more costly compared to Glacier Deep Archive for long-term storage.