Deloitte Auditing interview questions

Had a group interview discussing case studies given on the spot, generally about a car dealership trying to expand their business and what factors they need to take into consideration (listing out the pros and cons). Not much preparation can be done prior, just have to be alert and be sure to contribute as much as possible during the group discussion as HR would be monitoring and taking notes on the side.

Process took a day. I met with 2 senior managers. they were nice, but questions were quite hard. They asked about me GPA and about my CPA. They also asked about why I choose Deloitte, why should we hire you? No technical questions asked. Why big 4? I think I met at least six people through my interviewing process.