• How does express work?
• What are Middlewares?
• What is the MVC framework?
• How do you do static routing?
• What are common libraries you work with express?
• How do you manage sessions in express?
• What is CORS?
• How do you manage cookies with express?
• How do you do validations?
• What are some templating engines?
• What are routes?

Mongoose

• What are Models?
• What are aggregation pipelines?
• Explain why a mongoose does not return a promise but has a .then?
• I'm using an arrow function for a virtual, middleware, getter/setter, or method and the value of this is wrong. Why?
• Should I create/destroy a new connection for each database operation?
• My query/update seems to execute twice. Why is this happening?