Crucial Exams

AWS Certified Data Engineer Associate DEA-C01 Practice Question

An engineering team ingests sensor readings at 5 MB/s using Amazon Data Firehose, which converts JSON to Parquet and writes hourly objects to an Amazon S3 landing bucket. A recent defect required raw JSON from the last 72 hours, but those events were unavailable. The team must add a 7-day replay capability at the lowest ongoing cost and with minimal changes. Which solution meets these requirements?

  • Replace Firehose with Amazon Kinesis Data Streams, configure 7-day retention, and create a Firehose stream that delivers the data to the same S3 bucket.

  • Enable Source record backup on the existing Firehose delivery stream to store all incoming records in a separate S3 prefix, and set a lifecycle policy to delete objects older than 7 days.

  • Insert an Amazon SQS queue between Firehose and Amazon EMR, set the queue retention to 7 days, and configure EMR to poll the queue.

  • Turn on S3 object versioning for the landing bucket so older Parquet files can be recovered during reprocessing.

AWS Certified Data Engineer Associate DEA-C01
Data Ingestion and Transformation
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