Residence Permit for Studying in Norway
If you wish to study in Norway for longer than three months you must apply for a residence permit for students.
Study Permit
You do not need a residence permit if you intend to stay in Norway for less than three months, but you must apply for a visa if you come from a country with a visa requirement for entering Norway.
For more information about which studies constitute grounds for a residence permit, how to apply and which rights a study permit entails kindly click here http://www.udi.no/Norwegian-Directorate-of-Immigration/Central-topics/Studies/