Crucial Exams

AWS Certified Data Engineer Associate DEA-C01 Practice Question

A data engineer must generate a consistent logical backup of an Amazon RDS for MySQL instance each night. During the export, client applications may continue to read data, but no writes must occur on any tables until the dump is finished. Which approach meets these requirements with the least operational overhead?

  • Create a read replica, promote it to primary for the export, and direct client traffic to the new writer during the dump.

  • Run mysqldump with the --single-transaction option so the export occurs under snapshot isolation without explicit locks.

  • Execute FLUSH TABLES WITH READ LOCK in an administrative session, keep that session open for the duration of the dump, then run UNLOCK TABLES when the export completes.

  • Stop the RDS instance before starting the export and restart it after the dump finishes.

AWS Certified Data Engineer Associate DEA-C01
Data Store Management
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