What are the visa & residency requirements in Oslo?

"In order to visit Oslo, a visitor must obtain a visa from the Norwegian Embassy or Consulate in their home country. The visa application process requires the submission of a valid passport, a completed application form, a passport-sized photograph, and proof of sufficient funds to cover the duration of the stay. Depending on the purpose of the visit, additional documents may be required. In order to apply for residency in Oslo, Norway, an individual must submit an application to the Norwegian Directorate of Immigration. The application must include a valid passport, a completed application form, a passport-sized photograph, proof of sufficient funds to cover the duration of the stay, and documents that demonstrate the purpose of the stay. Depending on the purpose of the stay, additional documents may be required," said another expat in Oslo, Norway.