simonevinci wrote:Thank you very much for your answer!

Just another question if you don't mind. So do you think that more advanced course that I will take next year such as quantum mechanics, astronomy, nuclear and matter physics are more important than, let's say, a course of classical physics? And also is it relevant the fact that I will finish the studies in 3 year time rather than taking a longer time than requested? Because there are many people that take more time than normal to finish their studies, my 'phylosophy' has been to accept my grades and move forward to the next exam rather than trying it again. I've had just a couple of mid-to-low grades all the other have been fairly good.
Whether or not, say, astronomy will be important depends on your chosen master programme. In general, I would say that a course such as "classical mechanics" is important (especially if it's a high level course), whereas the specialised courses such as astronomy will only be important if you intend to study astronomy or astrophysics for your master's programme. If you already have a specific programme in mind, I would probably chose a mixture of specialised courses in that subject area, and general courses. But that would be my advice not just for applying in Finland, but in general.
Retaking exams that you have already passed in order to improve your grade is very uncommon here, if done at all - the transcripts I have seen will list all the grades from a given year, and I have never seen two passing grades for the same course, even if they were significantly lower than the average. I think people accept that you will have a range of results, and that it makes much more sense to learn something new, than just to improve a grade. Of course, when we see a very low grade on a core course, it's not as good as a good grade, but if, for example, someone has a "3" (a relatively poor grade) on Classical Mechanics I, but a "5" and a "6" on Classical Mechanics II and III, we assume that the first one was just an outlier, or maybe that they have discovered their love for classical mechanics later, and the "3" won't matter too much.