S3 Lifecycle Policies for Cost Optimization

• ✓ A.S3 Lifecycle rule
• B.S3 Versioning
• C.S3 Transfer Acceleration
• D.S3 Object Lock

Why A: An S3 Lifecycle rule is the correct feature because it allows you to define a transition action that automatically moves objects from a higher-cost storage class (e.g., S3 Standard) to a lower-cost storage class (e.g., S3 Standard-IA or S3 Glacier) after a specified number of days. This directly meets the requirement to transition logs after 30 days without manual intervention, optimizing storage costs based on access patterns.

• ✓ A.Use S3 Standard for 30 days and then transition to S3 Glacier Deep Archive.
• B.Use S3 Standard for 7 years.
• C.Use S3 One Zone-IA for 30 days and then transition to S3 Glacier Flexible Retrieval.
• D.Use S3 Intelligent-Tiering for the entire 7 years.

Why A: S3 Lifecycle policies can transition objects from S3 Standard to S3 Glacier Deep Archive after 30 days, minimizing costs while meeting compliance. S3 Glacier Flexible Retrieval is more expensive than Deep Archive for long-term archival. S3 Intelligent-Tiering adds monitoring costs. S3 One Zone-IA is not suitable for long-term archival due to lower durability.

• ✓ A.Use an S3 Lifecycle policy to transition objects to S3 Glacier Deep Archive after 90 days.
• ✓ B.Use an S3 Lifecycle policy to transition objects to S3 Standard-IA after 30 days.
• C.Delete logs older than 30 days.
• ✓ D.Set an S3 Lifecycle policy to expire objects after 7 years.
• E.Use S3 Intelligent-Tiering to automatically optimize costs.

Why A: Option A is correct because S3 Glacier Deep Archive is the lowest-cost storage class for long-term archival data, making it ideal for logs that are rarely accessed after 90 days. An S3 Lifecycle policy automates the transition from a higher-cost class (e.g., Standard-IA) to Glacier Deep Archive, reducing storage costs while retaining the data for the required 7-year period.

• A.Use S3 Glacier Flexible Retrieval.
• ✓ B.Use S3 Standard-IA storage class.
• C.Move data to S3 Intelligent-Tiering.
• D.Create a lifecycle policy to delete objects after 30 days.

Why B: The most cost-effective solution is to use S3 Standard-IA (Option B). S3 Standard-IA is designed for infrequently accessed data that requires immediate access; it offers lower storage costs than S3 Standard while maintaining low latency and high throughput. Option A (S3 Glacier Flexible Retrieval) has even lower storage cost but retrieval times of minutes to hours, which does not meet the requirement of immediate accessibility. Option C (S3 Intelligent-Tiering) automatically moves data between tiers to optimize costs, but it includes monitoring and automation charges that may not be cost-effective for data that is consistently infrequently accessed; also, it does not guarantee lower cost than Standard-IA for this pattern. Option D (create a lifecycle policy to delete after 30 days) would lose data permanently and is not a storage class; it also does not address cost savings for long-term storage.

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

Why A: S3 Glacier Deep Archive provides the lowest storage cost for data accessed once per year, with the same 99.999999999% (11 nines) durability as S3 Standard, because it is designed for long-term retention with retrieval times of 12 hours or more. The infrequent access pattern makes the lower retrieval costs of Glacier Deep Archive more economical than any other S3 storage class.