The interview was not organized well. First round was paper test. Even the HR who contacted me said it was a in-person interview. The hiring manage had not seen my resume until I got there. Test questions: 1. write a stack implementation with Java, required to use Array instead of ArrayList. 2. write a abstract tree with an "add" method which return the sum up value of the current node and the whole sub tree under it. write a implementation with Integer 3. write a SQL stored procedure, a query and some performance improvement tips. The second day, I was informed to take the second round interview in next week. No introduction, I was token into 4 different offices and 4 different managers interviewed me in turn. No one introduced himself before the conversation started, except the last guy. I was just lost there.