Practical GraphQL - Become a GraphQL Ninja - Creating the application shell

This video tutorial guides viewers through setting up a basic Express application with GraphQL features using Apollo Server. It covers the installation of necessary dependencies, including Node.js, Express, and Apollo Server, and provides an overview of the Apollo Server's website and documentation. The tutorial then demonstrates how to create a GraphQL server by defining type definitions and resolvers, and integrating Apollo Server as middleware in an Express application. The video concludes with a discussion on potential errors and the next steps for populating type definitions and resolvers.

What are the two essential components required by GraphQL as mentioned in the text?

What method does Apollo Server expose to integrate with Express?

What will happen if the Apollo Server is started without a schema or type definitions?