present perfect - "Have you seen her?" or "Did you see her?"

I already knew that we use the present perfect for an action in the past with a result now. Consider the following questions:

• "I'm looking for Paula. Have you seen her?"


• "I'm looking for Paula. Did you see her?"

Is there any difference between these two questions for this specific action (verb)? What is the result of "seeing" action which can't be represented by simple past?