For people who are taking this course:
Be familiar with the networking concepts (Load Balancers, VPCs) and know their use cases.
Read best practices for each product
Know how resources can be shared across projects
That’s all, the course along with qwik labs hands-on should be sufficient then for the preparation.
I studied for about a month for this exam with no experience in cloud before. I come from a Computer Science background, that helped a lot.