I applied online. The process took 1 day. I interviewed at Yelp in Oct 2010
Interview
Yelp HR called, and asked usual stuff. Tell what are you interested in? why Yelp? etc. Then he asked 10 short questions like look-up time for hashmaps, linux command for checking cpu usage, tree vs hashmaps, etc.
Interview questions [1]
Question 1
If you have less memory storage, what would you use - Hash Table or Tree? Why?