In the course manual you can find which components make up your course's final grade. In your Results overview you will find your final grades, rounded off to half a grade. In the Teaching and Examination Regulations (TER) of your programme (to be found in the Study Guide) you can find the rules concerning the rounding off of grades.
Obtained results and exemptions are valid indefinitely, unless the knowledge, insights or skills are outdated. The term for this differs per subject and can be found in the Teaching and Examination Regulations (TER). For students studying longer than nominal + 1 year, the validity of results may expire on substantive grounds.
In case of study delay due to personal circumstances, an extension of validity can be requested from the examination board using this form (GNK students: see this form). It is advisable to discuss this with an academic advisor, who can help think of solutions and assess whether you could qualify for support through the Student Support Regulation.