HR contacted me for a phone interview. This phone interview consisted of 3 questions and lasted approximately an hour: a string question, a brain teaser, and a graph question. I received an e-mail shortly after my phone interview to setup a 2nd. This one consisted of another 3 questions and also lasted around an hour: a string question, a graph question, and questions about how a hash table works. I didn't receive a 3rd phone interview or on-site interview request. Note: The phone interviews take as long as it takes you to solve the problems. Try to solve the problems as accurately and quickly as you can.