First a recruiter ask some behavior question, like why yelp, three things you care most when you are choosing a job. She also asked a lot one sentence technical questions, you can find them all here in the reviews. Followed two phone interviews with engineers. A load balancer, given [(a, 1), (b, 1), (c, 8)], a, b, c means the machine, 1, 1, 8 means 1/(1+1+8) probability returns a, 8/(1+1+8) probability return c, write code to implement the balancer. How would you test it?