The first one was an on-campus interview. It was 45 minutes long and consisted of 2 coding questions. The first one was checking if a string is palindrome the second one is to print out all the subsets. The second round was two weeks later. It was a 45 minute phone interview. The question was to multiply two numbers that are represented in string. My advice is that don't panic when you are given a hard question. I did not finish my last question and luckily still got the offer. Just try your best to show them how you approach the problem and be passionate and confidant!