Interview questions will mostly go about your project management skills and experience so you have to have a good grasp of the best practices you can apply during difficult project situations. You also need to have a basic understanding of the game development process (to simply understand the gaps between your current and the potential work at Ubisoft) and how your current skillset will come into play. In order to best prepare for the interview, ask as much questions as you can when HR discuss the job description with you as the questions will revolve around the expectations for the job.