When designing a serverless web application using Lambda, what key concept must you factor into your design?
Lambda does not use servers, so it can only return the same request to every user.
Serverless web applications run within the web browser of the user, so you will need to store any data the user changes directly in a database.
Lambda is stateless, so it won't remember who a user is in between requests.
Lambda only allows you to write functions in JavaScript.