ETL Testing Interview Questions and Answers
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Freshers / Beginner level questions & answers
Ques 1. What is ETL testing?
ETL (Extract, Transform, Load) testing is a process of verifying the correctness of data transformation and loading from source to target databases.
Example:
An example of ETL testing is validating that data from a CSV file is accurately transformed and loaded into a data warehouse.
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Ques 2. What is a staging area in ETL?
A staging area in ETL is an intermediate storage area where data is temporarily held during the extraction and transformation processes before being loaded into the target data warehouse.
Example:
Data extracted from source systems is first loaded into the staging area, where it undergoes transformations before being moved to the final data warehouse.
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