AWS Certified Solutions Architect Professional SAP-C02 Practice Question
An online video-sharing platform stores 500 TB of user-generated media in a single Amazon S3 bucket that currently uses the S3 Standard storage class. Historical analytics show that more than 95 percent of objects are never accessed again after 90 days, yet the application must be able to retrieve any object directly from S3 with sub-second latency (≤100 ms). The operations team wants to cut storage costs while avoiding additional Lambda code, restore workflows, or ongoing lifecycle-rule maintenance. Which action will provide the greatest cost savings while meeting all requirements?
Run an AWS Lambda function each day to copy objects older than 30 days to a second bucket that uses the S3 Standard-IA storage class.
Enable the S3 Intelligent-Tiering storage class on the bucket and keep the optional Archive Access and Deep Archive Access tiers disabled.
Enable the optional Archive Access and Deep Archive Access tiers in the bucket's S3 Intelligent-Tiering configuration.
Configure an S3 Lifecycle rule that transitions objects to the S3 Glacier Flexible Retrieval storage class after 90 days.
S3 Intelligent-Tiering automatically moves objects between the Frequent Access, Infrequent Access, and Archive Instant Access tiers. All three tiers deliver the same millisecond-level latency as S3 Standard, and the class requires no lifecycle rules or custom code. Leaving the optional Archive Access and Deep Archive Access tiers disabled prevents objects from being moved into tiers that require hours-long restore operations. Therefore, enabling S3 Intelligent-Tiering and keeping the optional archive tiers turned off meets the latency goal with the least operational effort and the lowest ongoing storage cost.
A daily Lambda copy to Standard-IA adds custom code and doubles PUT requests while achieving smaller savings. Transitioning to S3 Glacier Flexible Retrieval or enabling the Intelligent-Tiering archive tiers would violate the <100 ms retrieval-time requirement because these tiers require 1 minute to several hours to restore objects before they can be read.
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