If you survived the initial phone interview, the next step is probably an in-person interview. Every company has their own way of conducting these interviews. Some prefer to have "panel-like" interviews, while others prefer one-to-one interviews. Expect to interview with three to four technical people (most likely the people you will end up working with) and maybe a group manager. The entire interviewing process can take anywhere between 2 to 6 hours. If the interview overlaps with lunch hours, the company will usually arrange for lunch. Expect a wide variety of questions that range from common personal questions to very challenging technical questions relevant to the job you are applying for. Remember that the whole point of this exercise is for the interviewers to determine if you have the skills to do the job you are interviewing for, and if you are someone they would like to work with.