I applied online. The process took 2 days. I interviewed at McKinsey & Company (New York, NY) in Oct 2011
Interview
first round is math and verbal test in office with a group case study; not too difficult, but you do need to prepare as your math, calculating, and verbal reasoning skills.
second round is 2 1-on-1 interview with cases; each with 10-15 minutes fit questions, going into really detail. (e.g., your leadership skills examples), and a 30 minutes case discussion, (well-organized, with specific questions and numbers). only key on success if to practice.
The interview is structured exactly as the preparation materials describe, i.e. personal fit and case. All interviewers were friendly and supportive. After each interview round I received helpful feedback. The cases are not easy but fair.
Interview questions [1]
Question 1
Questions regarding the case. Interviewer will led the case though
First, there is a computer test screening. Then, you get invited for the first round interview, usually conducted by an AP. Then, for second round, you have two interviews with Partners. You get feedback quickly, less than a week between interview and feedback
3 stage interview with increasing seniority. Opportunity to prepare with current colleagues prior to interview which was useful. Straight forwards process, no big suprises if you prepare in advance but prep is needed