What makes a wedding successful?
This question leans on your opinion, though it can help to inform your response with any information you know about the couple (or hiringcompany). When answering this question, consider connecting your measure of success to the main goals and desires of the couple which were used to frame the wedding from the start.
"I believe that a wedding is successful when the couple appears happy, relaxed, and full of love. The most important part of any wedding, in my opinion, is the couple, so as long as they have truly enjoyed themselves and feel pure happiness, then I consider the event a success. Even if every logistical component to a wedding is flawless, I would still consider it a less successful event if the couple didn't appear to have enjoyed themselves."