Multiple choice technology databases

Which of the following port is used only in unconnected look up not in connected look up?

  1. Input

  2. Variable

  3. Return

  4. Output
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C Correct answer
Explanation

The Return port is specific to unconnected lookup and is used to return the lookup value when the lookup function is called from an expression. Connected lookups pass values through output ports directly, while unconnected lookups require a Return port to send the result back to the calling transformation via the lookup function.

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