The Police Officer, Nassau County Police Department (NCPD) Passbook(R) prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: reading comprehension; reasoning ability; work, school and general life experiences that are associated with successful performance of law enforcement duties; personality traits that are associated with successful performance of law enforcement duties; and more.