AWS Certified Cloud Practitioner (CLF-C02) — Question 569

Which Amazon S3 storage class is MOST cost-effective for unknown access patterns?

Answer options

• A. S3 Standard
• B. S3 Standard-Infrequent Access (S3 Standard-IA)
• C. S3 One Zone-Infrequent Access (S3 One Zone-IA)
• D. S3 Intelligent-Tiering

Correct answer: D

Explanation

Amazon S3 Intelligent-Tiering automatically optimizes storage costs by moving data between frequent and infrequent access tiers when access patterns are unknown or changing. Other storage classes like S3 Standard, S3 Standard-IA, and S3 One Zone-IA require predictable access patterns to avoid high storage or retrieval costs. This makes S3 Intelligent-Tiering the most cost-effective choice for unpredictable workloads.