Submitted resume at college career fair and get contacted within a week. First scheduled a phone interview with some entry level algorithm question and javascript question. Then reached by recruiter for an onsite interview with 4 engineers. Nothing hard at all since I answer all questions without any difficulty. The questions focus on web concept, data structure, entry level algorithm (not those dynamic programming or ACM stuff) and front-end technology. For example, find all bugs in a micro webapp. Everyone is super friendly and their office is awesome. Unlike most technical companies in that size, people in yelp are very young and dress much more ... fashion. BTW, They have the best cafe and kitchen of all companies I've interviewed.

I passed the online screening test, but the recruiter rejected after the phone screen without stating any reason. I have no idea what could possibly go wrong in the recruiter round, as my experience looked very apt. I think its just about the company being not able to relocate me at that given point of time.