I applied online. The process took 2 weeks. I interviewed at Deloitte in Jan 2012
Interview
It is a long process, please don't think that it will take any less than 3 weeks from initial interview to offer. The phone interview was standard, the panel can be challenging depending on what practice you will join. It will be based on case studies and ability to process data if you are early in your career and more substantive if you are a Senior Practitioner.
Interview questions [2]
Question 1
They will ask you about your projects in very great detail. How you organized them and what challenges you faced.
Case Study: If they are really sure about hiring you they will not are too much of the case study if not they will use this in figuring out what your strengths and weaknesses are.
I applied online. The process took 3 weeks. I interviewed at Deloitte (Sacramento, CA) in Nov 2010
Interview
The first interview was over the phone. The lady seemed very nice and shared a lot of information. On this first call you will get asked what salary you are expecting. I suggest you overstate your salary (do some research first on what the average person on that level makes and then ask for 10% more than the average).
The second interview was also a phone interview and this one was a skills interview. All I can suggest is that you learn your topic and know it well (i.e., if you are being interviewed for a Test Senior Consultant, at least know all the different approaches to testing depending on that implementation).
The third round of interviews was an in person interview. This one consisted of 3 interviews (about 30 to 45 minutes each). When you get to the office try not to be too stiff. Be friendly with the receptionist, and be outgoing. These interviews will not only focus on your ability to answer the questions, but they are also assessing your potential to be a Partner in the future (i.e., ability to sell work). You need to come across as a confident (but not cocky), and you need to know what you are talking about.
Interview questions [1]
Question 1
Why do you want to leave your current company to work for Deloitte?