The way you solve the exam is very important. A lot of people start solving the exam chronologically, before reading it through. This then leads to them not having enough time to finish the exam because they’ve spent too much time on the first task, to which they couldn’t remember the answer right away, panicked, and then made a mistake at the easiest tasks that they would’ve solved correctly had they started with them.
It’s very important that before you start answering exam questions, you go over the exam so that you know what awaits you. Solve the easiest questions and the questions you’re 100% sure of the answer first, and then take time for those you’re not so sure of. By doing that, you can arrange your time better, and if you don’t know all the answers make sure that spend exam time answering those you do know.