A company has a mobile app that uses Amazon S3 to store images. The images are popular for a week, and then the number of access requests decreases over time. The images must be highly available and…

Question

Options

• ACreate an S3 Lifecycle policy to transition the images to S3 Glacier after 7 days
• BCreate an S3 Lifecycle policy to transition the images to S3 One Zone-Infrequent Access (S3
• CCreate an S3 Lifecycle policy to transition the images to S3 Standard after 7 days
• DCreate an S3 Lifecycle policy to transition the images to S3 Standard-Infrequent Access (S3

• A
  4% (1)
• B
  12% (3)
• C
  4% (1)
• D
  80% (20)

Explanation

Option D is correct because S3 Standard-Infrequent Access (S3 Standard-IA) is purpose-built for data that is accessed less frequently but must be retrieved immediately when needed - it offers millisecond latency and stores data across multiple Availability Zones, satisfying both the "immediately accessible" and "highly available" requirements at a lower storage cost than S3 Standard.

Why the distractors are wrong:

• A (Glacier) fails the "immediately accessible" requirement - Glacier retrieval takes minutes to hours, not milliseconds.
• B (One Zone-IA) fails the "highly available" requirement - it stores data in only a single AZ, meaning data could be lost if that AZ suffers an outage; it is designed for reproducible or non-critical data.
• C (Standard after 7 days) is nonsensical - the images are already in S3 Standard, so transitioning to Standard saves no money.

Memory tip: Match the two key constraints to the right class - "immediately accessible" rules out Glacier, and "highly available" rules out One Zone-IA, leaving Standard-IA as the only option that satisfies both while reducing cost.

No community discussion yet for this question.