I was in touch in with a manager at the firm for over an year. During my junior year, I sent him my resume. Few days later, I got a call informing me of the interview offer. I was then interviewed by two consultants one of whom was an alumni of my college who too switched fields and had a profile similar to that of mine. The interview went on for over 45 minutes. There were open-ended questions like "Why did you choose this firm?", "Why are you switching from engineering to management?", etc. The second one was not as direct as it sounds. We then discussed my previous projects and my knowledge in finance. There were questions on financial modelling and more particularly, infrastructure finance. It was more of a discussion than a Q&A session. The interview concluded on a positive note. Three weeks later, I was apprised of the internship offer. At such a stage (junior year at college), the key is to be honest while writing your resume and include things relevant to the internship you're applying for and those you have really done in the past. One needs to be clear as to why she is applying for the internship and whether the internship is aligned with her goals. You need to be clear on why you want to work at the firm, what you can bring to the table and convince them. Be true to yourself and be yourself in the interview.