AI-103: Developing AI Apps and Agents on Azure

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QuestionQ9

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You have a Microsoft Foundry project containing a workflow for a customer support triage process. The workflow includes an Ask a question node that stores the user's response in a local variable named Var01. You need to build the following Power Fx expressions:

  • An if/else condition expression that confirms Var01 holds a value.
  • A Send message expression that returns the stored user response converted to uppercase.

How should you configure these expressions?

Select
If/else condition expression:
Send message expression:
Explanation

In Power Fx, IsBlank() tests whether a value is empty; wrapping it in Not() - Not(IsBlank(Local.Var01)) - evaluates to true only when the local variable actually holds a value, which is the correct if/else guard for confirming that Var01 contains a value. IsEmpty() is a table-oriented function and is not the correct blank-check for a scalar variable. To reference a workflow's local variable inside a Power Fx expression you must use the Local. scope prefix, so the Send message expression that returns the response in uppercase is {Upper(Local.Var01)}; Upper(Var01) omits the required scope prefix and does not resolve to the stored variable.

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