You register online. You go to the university or a CBT centre. You write a computer-based test (similar to JAMB but shorter). Your admission is based on your JAMB score plus the Post-UTME score. For Usmanu Danfodiyo University Sokoto, the method can change from one admission cycle to another. In recent years, UDUS has often used online screening rather than a written Post-UTME exam, but you should wait for the official screening announcement for your session. Once UDUS releases its screening details, I can help you understand exactly what to do and what documents you'll need.