Interviews are exhaustive with Presentation, Evidence based, Quantitative and Personal round with the country head (4 Rounds in a day) But very cordial and enthusiasm of interviewers is as much as yours. Interesting rounds and you actually enjoy the process. Lot of stress on Quantitative and Analytics. You are asked to come prepared with a presentation sans specifics but broadly describing your work in analytics experience in previous company. You can take a book to read as there will be gaps of 1-2 hours between interviews.