I read this book first in 2011 before interviews for the job of java junior. It helped me not only to prepare but also to understand better some concepts of java enterprise and learn some tiny details of related technologies. I used it again as a reference when preparing for interviews for my second job but it is already out-dated. I hope very soon there will be a new edition, including new things from Java 8, Spring etc.
This has much more then interview questions, through this book I had many A-HA moments about understanding J2EE architectures. Unfortunetly, it is now quite dated.