I applied through a staffing agency. The process took 1 day. I interviewed at McKinsey & Company
Interview
It was in Chennai and I was contacted by a consultancy. The interview was neat and professional...they limited the number of ppl to be interviewed on a day so u don't end up in a crowd like other firms ...I had four rounds.. HR which was very basic the main reason is to check communication and they filtered candidates in it. The second round was aptitude, third was operational round..which was conducted by managers and the last one was just a formality of meeting a senior manager. They didn't tell the result on the same day ..they told us they will call and within a week I got offer..the consultancy played an impo role it was easy to contact them and clear ur doubts even after interview. They were helpful. For me it was in a day for few others it was two days ..some didn't had apps..it's depend upon the process u are getting so just be open and ready to face whatever comes on ur way.
Aptitude - i was interviewed for finance section so mostly accounts some basic maths and English. It was little hard prepare the basic
Operational- there was no technical questions they started with tell me about urself and started asking based on the answers i gave..it took 15 to 20 min for me...time differs for each person so don't give too much thought about it.. for this just be confident and true.