I attended a Yahoo! designer event and got a chance to talk with other Yahoo designer and hand over my resume to one recruiter. After that I got email back from the recruiter about the design team would like to give me an on-site interview for 1 hour team presentation.

Start with phone interview with HR, then screening interview with the Hiring Manager, then onsite interview in one day with six designers and two PMs, which start with the presentation of your case studies, then white board challenges with multiple people