Meta UX Researcher interview questions

I applied online with an employee referral. Got an email for a phone call with a recruiter. The phone call was very easy and short (15 min). He asked me about my past projects and why I want to work at FB. I got an email the same day to schedule the next interview which was with a UX researcher. I applied for the qualitative track.

First-round was some simple questions from HR, about my background and interest. E.g. Why I applied to FB? What will be the most exciting project I want to do if I have unlimited resources here? Especially ask if qualitative or quantitative research. Second round was technical. It was tricky and hard. I didn't pass that.