As the book explains (paraphrased):
"Have you ever left an interview thinking you could have done better? If you are getting interviews but not the job offer, you have to improve your interview capability.
Interviewing is a high stakes game for both the interviewer and the interviewee. So you need to learn how to play the game, and play to win.
Therefore, prepare yourself to answer any interview question with a response that makes it clear why the company should hire you. Winning Answers for 500 Interview Questions will teach you how to become a more confident interviewee. Not only will you understand why such questions are being asked, but you will also have prepared a set of competent answers."
Of course, when it comes to questions about your expertise in the technology involved, it is up to you to do the necessary research and prepare your answers carefully, accurately and succinctly. By the way, there is no shame in taking in a small notebook with your question-answers and the questions that you want to ask. This tactic will demonstrate that you are also well organized.
R. Max Wideman
8. Ibid, back cover