Amazon Software Developer Intern interview questions

Pretty straightforward until the final interview. They asked me a difficult graph question and my interviewer was from Amazon Bangalore. Graph questions aren't really an intern level question. Then in order to test me on another question, she gave me another graph question, what?? I actually got the internship last year but was on the waitlist. Basically, the interview is somewhat luck and pure randomness with who you get. Shows you how scattered Amazon is in certain areas.