I applied through university. The process took 2 weeks. I interviewed at OpenTable (San Francisco, CA) in Feb 2015
Interview
Focus on basics. Few coding questions, few design. It is well planned by the HR. They fly you to SF and interviews last the whole day followed by a 3 hour coding exercise.
Interview questions [1]
Question 1
Design LRU cache.
Map Reduce problem related to Opentable data
Scalability questions for Opentable logins
Inventory optimization