When you answer the question, make sure you consider different facets of interactivity. The elements that go into interactivity could be visual or auditory. Try to use an example that not only shows know how to make elements interactive, but that you have a command of when and you should use interactive elements. If you haven't done any work with interactive elements in PowerPoint, share your level of experience and offer to focus on learning how to grow that skillset.

The goal is to show that you have advanced skills in PowerPoint. You want to showcase your ability to use interactive elements and share your philosophy on when to use those elements in a PowerPoint. Make it clear that not every project needs interactive elements. But, some project will greatly benefit from the use of interactivity as a method of simplifying content-heavy slides and making them more digestible.

I like to use interactive elements in my PowerPoint work when it is a beneficial way to deliver content. A recent example is a deck I put together for a client that had several interrelated slides. The client had to go forward and backwards with the slides several times to help explain the content and to address questions from the audience. I set the deck up with an interface that was tab-based. This enabled to presenter to select different tabs when discussing the content. It lead to a much smoother presentation that didn't require going backwards and forwards to facilitate a discussion.