Johnson & Johnson Data Science interview questions

Applied online, after a phone screen, got an onsite interview. They wanted me to give a presentation based on my dissertation research. They asked a lot of detailed questions. Overall, it went well and I thought that I'd get an offer. They told me I'd get results back in a week. However, they did not send me anything after 3 weeks. I had to email them 10 times to get back to me and say that I did not get the job. Also, they did not provide any feedback for me tho I asked for it.

Phone interview led to hiring; networking very important. Spoke with direct manager, team manager, group manager, etc... Sophomore year summer internship so process taken more lightly than normal. Full-time role interview much longer.