There were 7 people in our group interview.
The HR started off with a video presentation of Bloomberg which is exactly the video you can found in the website. After that, 2 Pricing Implementation Representatives had a general intro of their jobs and then there was a Q&A session which you can ask about specific questions.
After the Q&A, we had exactly 10 mins to think and take note about the group discussion question. 2 HRs and 2 Representatives observed our performances without any interruptions. The discussion lasted about 30 mins and thats the whole interview.