McKinsey's interview process is well structured and in general consists of multiple rounds of phone and 1:1 interviews. Non-MBA campus recruiting also involves a written test (multiple choice) that tests candidates' general business understanding and analytical skills. 1st round of 1:1 interviews are either on campus or in a McKinsey office that's close to the candidate's location. 2nd/final round interviews are with the specific offices that candidates are interested in joining. Each round of interviews involves 3-4 half-hour interviews with consultants at various tenure (more likely with partners in 2nd round). Typical 1:1 interview has 3 components: experience, case, and Q&A. There are plenty of information on McKinsey's website and other job boards about how to prepare for case interviews.

really thorough and the interview process was really smooth and not too stressful. the game was pretty difficult but practice makes perfect. I am so glad I had the opportunity to be selected for an interview