The ITIL 4 MP Transition certification exam consists of 40 multiple-choice questions. You have 90 minutes to do this and you pass if you answer 70% of the questions correctly (28/40). Regarding the online exam, you will receive a voucher with which you can schedule the online exam at a time of your choice with PeopleCert.
Did you not succeed? In that case, you will receive a voucher for a resit free of charge.