Interview Questions

Why ETL testing is required?

ETL (extract, transform, and load) Testing Interview Questions

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32. Why ETL testing is required?

To verify the correctness of data transformation against the signed off business requirements and rules.
To verify that expected data is loaded into data mart or data warehouse without loss of any data.
To validate the accuracy of reconciliation reports (if any e.g. in case of comparison of report of transactions made via bank ATM ATM report vs. Bank Account Report).
To make sure complete process meet performance and scalability requirements
Data security is also sometimes part of ETL testing
To evaluate the reporting efficiency

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