Chapter 9: Generating CloudFormation Templates Using AWS CDK

1. Constructs are building blocks of CDK. Any block of CDK, such as App, Stack, Asset, or Resource is considered to be a Construct.
2. You have to define each stack separately by assigning a stack class to it as a value.
3. By adding subnet configuration to the VPC construct. Originally, CDK was developed by TypeScript, but there are libraries for Python, Java, C#, and JavaScript. The CDK development team is working on more languages to support in CDK.
4. No, CDK will use the default credentials and config to connect to AWS. But it is recommended to provide an account ID and Region when using CDK in production.