Course requirements are tied to the implementation of a subject, and assessed by a pass/fail grade. The course requirements must be approved before you can take the exam. Examples of course requirements can be requirements of attendance, drafts of an assignment, book reports, short tests, etc.. The course requirements are listed in the course description. Information about deadlines for submissions of course requirements are found in Canvas.
If you are prevented from completing course requirements and have a valid reason, you must contact the academic person responsible for the course. The requirements for documentation are the same as on exams. Read more about valid reasons for absence here.
If you have passed course requirements in a course earlier, you can apply for exemption. The application must be sent to the person with course responsibility (listed in the course description).