You probably won't have any trouble thinking of a story for communication questions, since it's not only part of most jobs; it's part of everyday life. However, the thing to remember here is to also talk about your thought process or preparation.

☛ Give me an example of a time when you were able to successfully persuade someone to see things your way at work.

☛ Describe a time when you were the resident technical expert. What did you do to make sure everyone was able to understand you?

☛ Tell me about a time when you had to rely on written communication to get your ideas across to your team.

☛ Give me an example of a time when you had to explain something fairly complex to a frustrated client. How did you handle this delicate situation?

☛ Tell me about a successful presentation you gave and why you think it was a hit.