Tell me about the last time you mentored someone.

Let these value propositions from PwC's website inform and guide your answer to this question: "Whether you're an experienced professional or starting out in your career, we'll look for you to provide examples of how you've demonstrated the PwC Professional attributes throughout your work experience, academic studies, extra-curricular or volunteer activities. We recommend you start your interview preparation well in advance and consider how you can demonstrate each of the five attributes in The PwC Professional framework. Whatever the role, level, or expertise you bring to PwC, we look for people who love making a difference wherever they can. Our people will have greater opportunities to grow, to practice new skills, and to then work on different teams and new assignments of interest. We will elevate leadership and coaching skills for everyone at all levels."

A blog on PwC's website offers the following advice for manifesting leadership confidence: "Stand up and raise your arms in a wide V over your head, and push your chin forward as if you're crossing the finish line of a race. Social psychologist Amy Cuddy has noted that primates often adopt this position at times of triumph. Even at less dramatic times, it tends to generate a feeling of confidence. Some of the business leaders I know privately spend a few minutes per day in this position precisely for that reason."

For more on Amy Cuddy's discussion on this topic, check out her TED talk, 'Fake It Till You Make It.'

"Just earlier today, I was mentoring the person I am training to take my place when I leave my current company. I feel like they will do well, maybe even better than me, considering the strong foundation I am helping them build. They're going to hit the ground running."