Entire process consisted of two phone interviews and then one on-site (remote due to pandemic) with three separate interviews. There were four case studies and problem exercises.
First interview: a phone call with a current BDA who will go through a probability and expected value problem. They will change the scenarios and have you compare expected values between situations to make recommendations (mine was the baseball ticket problem described in other reviews).
Second interview: another phone interview with a senior BDA, who will do a more traditional business case study (coffee shop case study).
"On-site" interview: one interview with an analyst with a live-Google Sheets contest sizing problem, a traditional background/behavioral interview with an analytics manager, and a third case study interview (mine was about using data and visualizations to explore an undefined problem with a subway system).
Overall, the interviews are very impersonal. The only chance you'll have to ask questions (aside from the behavioral interview if you get to the final round) is if you knock out the problems/case studies quickly. They really only seem to care how you perform on those. The majority of the case studies/problems are presented verbally and, frankly, reading paragraphs of question-set-ups to candidates is a pretty terrible way to present problems. Most companies have this figured out in their hiring process (e.g., sharing written instructions, conducting technical knowledge tests online, live coding interviews, etc.) but apparently not DraftKings. It was obvious that most of the interviewers were simply checking answers against a key - these case studies aren't really about seeing how you analyze problems and work with others, it's really just an oral test. The case studies are all relevant and genuinely useful, but their presentation is pretty poor.
The primary reason my interviews were a bad experience was because I was simply ghosted after the final "on-site" interview. It's inexcusable to never inform a final-round candidate about a hiring decision. I followed up with my recruiter a few days after the final round and they didn't even reply to me until *two weeks* later asking to set up a time to discuss feedback. Sure, why not, so I provided availability and was ghosted again. Perhaps this is just a problem with HR/recruiting (and it seems to be a long-term problem based on other reviews here), but it really reflects poorly on a company as a whole.