Unfortunately, there are bad people who illegally copy the questions from the exam and who want to cheat their way into the SCJP - this is not good for people who work hard to earn their SCJP, because it devaluates the exam.
On the other hand, if people who have cheated get a job interview, the interviewer will quickly discover that they don't know anything about Java.
On JavaRanch, we do not want to help people to cheat, and that's one of the reasons why it is required to
quote your sources if you post a question copied from a book, mock exam or other source. We have a list of websites that contains illegal material, and if someone posts a question coming from such a website, it is deleted by the moderators. (The list is only accessible to the moderators).
The 72 questions that you get on your SCJP exam are selected from a large pool of questions. So not everybody gets the exact 72 same questions.