Am I allowed to enter Norway before I have received an answer to my application?

Most applicants must apply through an embassy and wait for the answer in their home country. 

You may only hand in your application in Norway, or enter Norway before you have received an answer to your application, if you qualify as a skilled worker and have legal residence.

You can move in with your host family before you have received your Au pair permit, but you cannot begin to exercise your Au pair chores before UDI has granted you a residence permit.