The test itself is a multiple-choice test - there are no-paragraph or essay-like questions.
There are 3 sections: "Traffic Signs, Signals and Road Markings", "Rules of the Road", and "Controls for Vehicles". The first 2 sections have 30 questions each, whereas Controls for Vehicles has 8 questions. You need to pass each section on its own before you can pass the whole test - so if you pass 2 of the 3 sections, but fail 1 section (even a little), you will NOT pass your test. You need to pass all 3 sections. The number of questions you need to get right for each section are as follows:
Traffic Signs, Signals and Road Markings: 23/30 (77%)
Rules of the Road: 22/30 (74%)
Controls for Vehicles: 6/8 (75%)
Please note that these numbers may differ slightly between testing centres, so we advise that you always check your local testing centre to see what their requirements are.