There is an individual, written, closed-book exam at the end of the course.
Some old exams can be found here.
Expected Effort
One higher-education credit (ECTS credit) translates under Swedish university law into an expected 26.67 hours of work for the average student. Hence 133.33 hours are expected on this 5-credit course.
The exam is worth 3 credits. In addition to the exam preparation performed while working (during 90 hours) for the 2 credits for the assignments the remaining preparation and the taking of the exam are expected to take 24 hours. Recall that 19.5 hours are spent on the 13 lectures.
All this does not clash with other courses you are taking, as university studies are legally defined to take 400 hours of work per study period (normally 10 weeks), and the standard 15 credits targeted in a study period are calibrated to reach that total.
Exam Grade
The exam grade is determined by a published scale depending on the exam score.
Overall Grade
The overall grade is determined by a published scale, depending on the assignment and exam scores.