I applied through an employee referral. The process took 2 weeks. I interviewed at Deloitte
Interview
2 week process that had 2 rounds, both of which were online through hirevue. 1st round was a case study with a senior manager. If you passed that, the 2nd round had 2 parts to it: a case study, and a behavioural. The behavioural was pretty standard, but make sure to do your research about the company before the interview. As for the case study, it was pretty much the same as round 1. Make sure to check out Deloitte's website as they have practice case studies with recommended answers. That format is exactly how the interview will be.
I applied through university. The process took 3 days. I interviewed at Deloitte (Arlington, VA) in Oct 2013
Interview
On campus with two interviewers at 45 minutes each
Second round also on campus with two different interviewers at 45 minutes each
Immediate followup by telephone after each round - within one or two days
Interview questions [1]
Question 1
Why do you want to work with federal government clients?