AWS cost management tools with appropriate use cases (for example, Cost Explorer, AWS Budgets, AWS Cost and Usage Report)
How to protect personally identifiable information (PII)
Load balancing concepts (for example, Application Load Balancer)
Event-driven architecture
NAT gateways (for example, NAT instance costs compared with NAT gateway costs)
Network connectivity (for example, private lines, dedicated lines, VPNs)
The access of private resources in VPCs from Lambda code
Relational and non-relational databases
Network routing, topology, and peering (for example, AWS Transit Gateway, VPC peering)
Create, read, update, and delete (CRUD) operations
Network services with appropriate use cases (for example, DNS)