Either a home exam, an oral examination or a written examination, or a combination, with regular Norwegian grading system.
The Norwegian system for grading and assessment using the letter grades A - F, in which A denotes the best/highest grade and F denotes "not passed". Candidates work can also be assessed as "passed", "not passed", "approved" and "not approved". http://www.nord.no/en/about/rules-regulations/Pages/default.aspx