The ADI qualifying exam comes in three parts. Part one the theory and hazard perception test. This is a computer touch screen test of 100 multiple choice questions and a computerised DVD Hazard Perception test. Part two is the practical test of your driving ability. A PDI (potential driving instructor) is allowed only three attempts at the part 2 test, so the standard of driving needs to be of an excellent standard. The part three test of instructional ability is the hardest test to pass out of the three tests. The test itself is a test of ability to teach a real learner pupil or a full licence holder. A PDI only has three attempts to pass this very complex test of instructional ability.