I recently gave the exam but I didnot find any "demo" there. (May be I missed that link, I am not sure). Before you start the exam, they will ask you a set of 7-8 Survey questions (asking about your proficiency in various java concepts.) The time taken by you in answering these questions is not included in the total exam time. However, after the exam starts (and the clock starts), the first three pages ask you to sign some non-disclosure agreements etc. The time required by you to accept these is included in the exam time.