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AWS Certified Data Engineer Associate DEA-C01 Practice Question

A company ingests 50,000 IoT sensor readings per second. Each record is less than 1 KB of JSON. Data must be available for dashboards that query individual device readings with single-digit millisecond latency. Records are retained for 30 days, after which they should be automatically removed without administrator intervention. Which AWS storage service best meets these requirements while minimizing operational overhead?

  • Amazon DynamoDB with TTL enabled on the ingestion timestamp

  • Amazon Aurora MySQL with read replica autoscaling

  • Amazon Redshift cluster using automatic table vacuum and retention policies

  • Amazon S3 bucket storing gzip-compressed JSON objects

AWS Certified Data Engineer Associate DEA-C01
Data Store Management
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