My first interview was called by a recruiter and that was about 5-7 minutes. Questions such as: Why do you want to work at Best Buy?
My second interview was with the Sales Manager about a week later and it first was a group interview that let us all introduce ourselves and asked us to describe what we thought was our worst shopping experience (most said Wal-Mart). Later we were asked to step outside and we had 1:1 interviews that lasted about 30 minutes and questions were about.. the "describe a time when..." and what you think customer service is..
The third interview was a week later with the General Manager, it was bit more challenging this time b/c he wanted to know about your future he had alot more questions for you such as Why Best Buy, best shopping experience, it wasn't as hard, just more questions.