Multiple choice technology

Which component does not need a key?

  1. Sort

  2. Rollup

  3. Join

  4. Reformat
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sort requires a key for ordering records. Rollup needs a key to group records for aggregation. Join requires keys from both inputs to match records. Reformat, however, operates on individual records without requiring any key - it transforms each record independently based on the transform logic.

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