It took about 40 minutes, started off with a quick introduction then moved on to guestimation. Solved one guestimation, and once case study was not too heavy with numbers. Then, ended off with more fit questions. They asked a lot about heavy working hours, and my ability to cope with stress.
First half of the Interview is the behavior part. They ask brief questions regarding the resume. This only takes 1-2 mins. Bulk of the interview is casing. For my interview, the interviewer asked 1-2 casing questions.
Interview questions [1]
Question 1
If there's a train traveling from point A to point B (long distance), identify the sources of revenue and approximate its yearly revenue.
This was an internship interview in Korea. The interviewer looked at my resume, saw that I was a student-athlete, and told me I should look into jobs in my sport-related field. He didn't even let me introduce myself.