If this question looks familiar to one that the Microsoft interviewer has already asked you, it may be. Interviewers often ask similar questions in different ways to correlate the information you are providing them and determine if you are being consistent throughout the interview. This is one method they use to discover if any of the answers you have provided were fabricated or inaccurate. Keeping your answers brief and to the point and never fabricating an answer will help you be consistent throughout the interview. If you don't know the answer to a question, let the interviewer at Microsoft know this and then describe how you would locate the information they are asking you about.