Got the interview from my campus. Had a phone interview of 45 minutes. The interviewer was very cool. Asked questions about threads and processes. Asked me to code the number of nodes in a binary tree. Then I had 4 rounds of onsite interviews. Interviewers were from different product groups. First interview I was asked to write a program to compare version numbers. Print out the highest version number. In the second interview I was asked to write a program to remove duplicates with different complexities and level order traversal of tree. Third interview was theory based nothing specific. Final interview I was asked to show producer consumer problem. Then I was asked to draw classes for flight reservation system.