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PROFESSIONAL-DATA-ENGINEER · Question #212

PROFESSIONAL-DATA-ENGINEER Question #212: Real Exam Question with Answer & Explanation

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Submitted by kwame.gh· Mar 30, 2026Designing data processing systems

Question

You use BigQuery as your centralized analytics platform. New data is loaded every day, and an ETL pipeline modifies the original data and prepares it for the final users. This ETL pipeline is regularly modified and can generate errors, but sometimes the errors are detected only after 2 weeks. You need to provide a method to recover from these errors, and your backups should be optimized for storage costs. How should you organize your data in BigQuery and store your backups?

Options

  • AOrganize your data in a single table, export, and compress and store the BigQuery data in Cloud Storage.
  • BOrganize your data in separate tables for each month, and export, compress, and store the data in Cloud Storage.
  • COrganize your data in separate tables for each month, and duplicate your data on a separate dataset in BigQuery.
  • DOrganize your data in separate tables for each month, and use snapshot decorators to restore the table to a time prior to the corruption.

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Topics

#BigQuery data organization#Data backup strategy#Cost optimization#Disaster recovery
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