Samfunnskunnskapsprøven - how easy or difficult?

To apply for permanent residency, I need to either complete 75 hours of social studies (Samfunnskunnskap) in Norwegian or English or pass the UDI exam. How difficult is the exam? My practical Norwegian level is around A2. I'm considering studying Samfunnskunnskap materials in Norwegian and taking some practice tests. Would this preparation be sufficient? What has been your experience?