I applied through college or university. The process took 2 weeks. I interviewed at Deloitte
Interview
Two sets of behaviorals (for Advisory), one on campus, one in the office. No cases. This was in 2017. It was a few weeks between application and interviews 1/2. One day between interviews 1/2 and 3/4. A few weeks before the offer (mine was a large office).
Consisted of a behavioral interview and a scenario interview. No technical questions were asked but they just want to see how you think and process problems. If you prepare and do your research, you should be fine.
Really friendly and easy going interview. Two people conducted the interview and asked a range of questions about college, other experience and why you would like to work in Deloitte