WYSS Institute interview questions

I applied for the position in October and didn't hear anything until November. First I was sent a pre-interview questionnaire that I had to fill out. After sending it, I didn't hear anything for a week until I was scheduled for two interviews with HR. After HR, I scheduled an interview with the hiring manager. From that interview, she told me the next steps would be a three-panel interview with different teams, all on the same day. After those inteviews, It took another three weeks to receive a rejection email. Overall I found the experience lost and stressful.