Questions were mostly on VPCs, Bastion servers, NAT instances/NAT Gateway, Direct Connect, VPN, Auto scaling, Elastic Load Balancing, EC2, S3, EBS,Security Groups, NACLs .
Few questions were on Lambda, API Gateway as well. I didn't find questions on ECS though or may be i might be forgetting something !! Sorry about that !!
Please make sure to practice all scenario based questions thoroughly, go through VPCs(Route tables,public , private subnets), auto scaling, security groups and FAQs of all services mentioned in blue print.