AWS Certified Data Engineer – Associate (DEA-C01) — Question 180

The company stores a large volume of customer records in Amazon S3. To comply with regulations, the company must be able to access new customer records immediately for the first 30 days after the records are created. The company accesses records that are older than 30 days infrequently.

The company needs to cost-optimize its Amazon S3 storage.

Which solution will meet these requirements MOST cost-effectively?

Answer options

• A. Apply a lifecycle policy to transition records to S3 Standard Infrequent-Access (S3 Standard-IA) storage after 30 days.
• B. Use S3 Intelligent-Tiering storage.
• C. Transition records to S3 Glacier Deep Archive storage after 30 days.
• D. Use S3 Standard-Infrequent Access (S3 Standard-IA) storage for all customer records.

Correct answer: A

Explanation

Option A is correct as it allows for immediate access to new records for the first 30 days and then transitions to a more cost-effective storage class. Option B may not be the most cost-effective since it incurs additional costs for monitoring access patterns. Option C involves a longer retrieval time and is not suitable for records that need to be accessed immediately. Option D does not optimize costs, as it keeps all records in a higher-cost storage class regardless of their access frequency.