Something will work out only if you have a good tongue hanging, and you are absolutely sure of what you say. The main thing in your case is not to stop, brazenly speak and speak with an intelligent look, face with a hoe and go ahead, but for this you need a cold and calm head, it is better to drink something like Afobazol before the exam. And think, maybe there is still time to read at least something?)
Write off. the best way to take a written exam. But it depends on the cheating skill. To write and tell orally, but a lot depends on the examiner. It is dangerous to use it in foreign universities, there they are severely punished for it.
For an oral exam, the easiest way is to chat and get out on old knowledge
If the exam is oral, then you should try to speculate on this topic, show your interest, if you do not know anything, there is an option to listen to what other respondents say, sometimes there is an opportunity to catch on to some idea and already unwind it with your answer .. If the exam is written, then the main thing is to write more, that is, the main thing is to pour water there and there.
But still, it is better to prepare and procrastinate less))
If this is an oral exam, then everything is simple (and difficult). ... In fact, success depends on your ability to speak, charisma and relationship with the teacher.
Well, everything is simple with writing. You write what you know.