The selection process is described on Norwegian's webpage in the introduction text to where you apply.
It says:
"The first step is to fill out and submit your CV and application. You will then receive an e-mail confirming the receipt of your application. In addition you will be sent an invitation to do five online tests."
[...]
"Applicants that fulfill the requirements for the position and successfully pass the online tests and background checks including references check, will be contacted via e-mail if advancing further in the assessment process. Please note that it is an ongoing recruitment process."
As I understand, if you don't hear anything after you have completed the online tests, it simply means that you have passed it and wait for the next step. Norwegian will contact you only if you fail something or go further in the process.
Hear they have thousands of applications why they probably cannot reply with a separate email to each individual. They are not so many people doing the recruitment. It's a LCC.
Heard from a friend that screened this week that they screen 250 pilots only this summer; June, July and August. Impressive.
