Practical GraphQL - Become a GraphQL Ninja - Basic GraphQL Queries and Types

The video tutorial explains how to use GQL from the Apollo Server package to create type definitions and resolvers for GraphQL queries. It covers defining a custom user type with non-nullable fields and adding resolvers to fetch data. The tutorial also demonstrates testing GraphQL queries using tools like Insomnia and the Apollo Server's GraphQL playground. Finally, it recaps the session and outlines future steps for developing a GraphQL endpoint capable of interacting with a database.

What is GQL primarily used for in the context of GraphQL?

• To manage database connections

• To handle HTTP requests

• To create schemas using template literals

• To define server routes

Why is it important to define a non-nullable field in GraphQL?

• To make the field optional

• To allow the field to accept any data type

• To improve query performance

• To ensure the field always has a value

What is the primary role of a resolver in GraphQL?

• To handle client-side rendering

• To define the schema structure

• To fetch data for a query

• To manage user authentication

In a resolver map, what does the 'me' function return in this example?

• A list of users

• A static user object with the name 'Susan'

• A dynamic user object from a database

• An error message

Which tool can be used to test GraphQL queries as mentioned in the video?

• Postman

• cURL

• GraphiQL

• Insomnia

What does the GraphQL playground provided by Apollo Server allow you to do?

• Test and run GraphQL queries

• Write server-side code

• Create RESTful APIs

• Manage database schemas

What is the significance of the 'me' query in the context of user data?

• It fetches user data from an external API

• It represents a list of all users

• It is used for user authentication

• It denotes a currently logged-in user