The test is written in multiple-choice format. At some testing centres you will take the test on a computer, at others it will be a pen-and-paper test. When you make the booking for your test, ask your testing centre whether they use computers or test books.
For the pen-and-paper test you will be given a book of questions, an answer sheet, a chart of road signs and a book showing various road layouts as well as pictures of the controls of a vehicle.
The examiner will explain how the test is to be conducted and which sections you must answer, depending on which class of vehicle you wish to drive once you have qualified. Make sure you listen very carefully to the instructions. If you're not sure about any aspect of the testing procedure, don't be shy to ask. There will probably be other people who need clarification too and your question to the examiner could help those candidates as well.