Crucial Exams

AWS Certified Data Engineer Associate DEA-C01 Practice Question

An IoT company writes 5 TB of compressed Parquet files to an Amazon S3 data lake every day. Dashboards query the most recent 30 days of data many times per hour, while files older than 30 days are rarely accessed but must still be retrievable within a few minutes for regulatory audits during the next 5 years. Which storage approach best balances performance with cost?

  • Transition objects older than 30 days to S3 Glacier Flexible Retrieval and use Expedited retrieval when audits occur.

  • Create a lifecycle rule that moves objects to S3 Standard-Infrequent Access after 30 days.

  • Keep the first 30 days in S3 Standard, then transition objects to S3 Glacier Instant Retrieval after 30 days by using an S3 Lifecycle policy.

  • Store all files in the S3 Standard storage class for their full 5-year retention period.

AWS Certified Data Engineer Associate DEA-C01
Data Store Management
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