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KeyChange() is generated from stage

  1. Sort

  2. Change Apply

  3. Change Capture

  4. Transformer

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A Correct answer
Explanation

In Informatica PowerCenter and similar ETL tools, the KeyChange() function is generated by the Sorter/Sort stage. When you enable key change detection on sorted data, the Sort stage generates KeyChange() values that indicate when the sort key value changes between rows.