Crucial Exams

AWS Certified Data Engineer Associate DEA-C01 Practice Question

An AWS Glue crawler registers daily Parquet files stored under the Amazon S3 prefix s3://datalake/iot/year=YYYY/month=MM/day=DD/. Business analysts query the table from Amazon Athena, but the current day's data is not visible until the crawler's nightly run. As a data engineer, how can you expose new partitions to Athena within minutes of arrival while keeping operational effort low?

  • Trigger an AWS Step Functions workflow from CloudWatch Events that calls ALTER TABLE ADD PARTITION for each new file detected.

  • Change the crawler to run every five minutes on a fixed schedule.

  • Replace the crawler with Athena partition projection and define formulas that generate the year, month, and day partitions.

  • Enable Amazon S3 event notifications to invoke the crawler in incremental mode whenever new objects are created.

AWS Certified Data Engineer Associate DEA-C01
Data Store Management
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