This is a very complex industry, so you will likely encounter a scenario where you're asked a question you don't know the answer to. The interviewer wants to discover more about how you would react when you lack the knowledge necessary to answer a question. Demonstrate to the interviewer that you can acknowledge when you don't know something instead of making it up on the fly and commit to finding that answer and following up with the person timely. Give an example of how you self-help and track down information or how you've found the appropriate person to ask. Telling the person, "I don't know," or "that's not my department," is never appropriate, and the interviewer wants to learn more about your customer service skills and problem-solving approach.
