The listening part of the test is the first you will encounter. It is divided into four sections with increasing difficulty. The main problem is that you will be allowed to listen to the cassette just once.
Some questions are multiple choice.
The total number of questions you have to answer is 40. More than 30 anwers right means a good mark, but sometimes you may get an acceptable mark even with 27 or 28 correct answers. Waiting could be a mistake because later you will not to remember the answer, particularly if you have to write something, and you won't get the chance to listen to the same piece again. You will have the chance to read the following questions before listening each section. In fact you do not have to understand everything if you want a good mark.