Multiple Choice Flashcards on 02 AWS Certified Machine Learning Engineer - As...

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Flashcard Practice AWS Certified Machine Learning Engineer - Associate Multiple Choice

A company needs a feature store for online inference. Requests look up the latest feature vector by customer ID, stale values older than one day should expire, and writes arrive from batch jobs. Which DynamoDB design is most defensible?

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Use table scans for inference because scans avoid the need to choose a primary key Use a key schema built around customer lookups, store the latest feature item with a TTL attribute, and monitor throttling and item size limits Place feature vectors in CloudTrail logs because audit services retain events by default Store all customers in one partition so a single query can retrieve every feature vector

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