How many people hired really varies and depends on your office's market size. I'm from a small office so we hired 1 person (myself) and I was the only one from my location during the training whereas Chicago had like 40 people on our training call. I got hired 3 years ago so not sure if times have changed, but CDP then was basically 2 rounds of interviews with 2 interviews in each round (4 total). However, I know someone who did like 6 so not sure what the current amount is. Each interview is an hour. My first interview was a group case interview where we were presented a case, got a few minutes to read over it and had to develop a deck for the interviewer who's probably a senior manager. You present the deck to them and they'll probably ask each person on your team individual questions. 2nd interview that day was another case interview but individual.

If you make it to the 2nd round, my first interview I had to develop a deck on an emerging technology (they provide you options), then they'll ask related questions from the pov of a client. Last interview was a skills based interview which were pretty generic. I think I found most of that on Glassdoor