No consulting interview would be complete without case interview questions that test a candidate's ability to think strategically about problems. Answering them is all about preparation (that's why you're at business school-and why there's no shortage of guides to help prepare) as well as a continuation of the approach for market sizing questions-make it a conversation, and explain every step of your thinking/process along the way. Again: showing that you can arrive at a solution after thoughtful questioning and analysis is far more important in these questions than being able to throw out a brilliant new strategy on the fly, so focus on the process, and allow it to lead you to a solution. Some examples:

► "Client X is deciding how best to enter a new market. They have a choice of buying an existing company, or developing the technology in-house. How would you think about advising them to make the best decision?"

► "How should a nuclear plant deal with waste products?"(Hint: the same person who submitted this question told us that the answer "involves heavy analytic calculation about the recycling of plutonium, various storage option with different cost structures, and recommendations taking into account various green initiatives and business risks.")

► "An online brokerage is growing well but can't seem to reach their profitability goals; what could be going on?"

► "You're discussing a contemplated divestiture with the CFO of a large corporation. What are some of the points you'd want to make in considering how our firm can potentially assist him or her? What key themes would you want to hit on?"

► "Your client is a Fortune 50 aerospace and defense company interested in entering adjacent markets through organic or inorganic expansion. Which markets should she enter and how?"

► "How would you go about advising a hypothetical client on commercializing a teleportation device that they have invented?"

► "Should I open Chick-Fil-A on Sunday?"

► "Should I put Wi-Fi on my airline?"

► "Our client is thinking of acquiring a company that makes a certain type of medical device; what do they need to consider in making their decision?"

► "Our client wants to enter the wine market; how should they go about doing so?"