For investment banking roles, you are generally interviewing with Macquarie Capital, the division that provides advisory, capital-raising, financing, and principal-investment capabilities. Macquarie is also a diversified financial group, with businesses that include Commodities and Global Markets and asset management. That gives you more platform-specific material to discuss than you would have at a pure advisory boutique.
Expect considerable attention on why Macquarie fits your interests, how you make decisions, and whether you can discuss sectors and transactions thoughtfully. Its recognized experience in infrastructure, energy, and real assets makes informed sector interest particularly useful, although the emphasis varies by office and group.