There are several rounds.
1. Prelim introductory round with either the Hiring Manager or a Senior UX Researcher
2. Followed by a technical round with a senior researcher
3. Then you are called for a panel interview, comprised of 5-6 researchers, managers, product managers, designers. During the panel, you need to present your research portfolio, then another interview round with 2-3 researchers. This is followed by a research assignment, then interview with designers, last is interview with a product manager.
4. HR