Practical GraphQL - Become a GraphQL Ninja - Introduction to GraphQL

This video tutorial introduces GraphQL, a query language for APIs, highlighting its advantages over REST, such as the ability to make a single request for complex data. It explains the concept of schemas and types in GraphQL, including non-nullable fields and custom scalars. The role of resolvers in defining data sources is discussed, along with a simple query example. The course project involves building a GraphQL server using Node.js, MySQL, and Apollo Server, with a brief mention of a React application to consume the GraphQL endpoint.

What is one of the main advantages of using GraphQL over REST APIs?

• GraphQL can specify exactly what data is needed, reducing over-fetching.

• GraphQL is only compatible with NoSQL databases.

• GraphQL requires less setup than REST APIs.

• GraphQL allows for multiple requests to be made at once.

What does it mean when we say GraphQL is storage agnostic?

• GraphQL requires a specific type of database.

• GraphQL does not need any data storage.

• GraphQL can only work with JSON files.

• GraphQL can work with various data storage systems.

What is SDL in the context of GraphQL?

• Standard Data Language

• Structured Data Layout

• Schema Definition Language

• Simple Data Language

In GraphQL, what does a non-nullable field indicate?

• The field is optional.

• The field must always return a value.

• The field can be left empty.

• The field can only contain numbers.

Which data type is considered a special type in GraphQL for internal identifiers?

• String

• Boolean

• ID

• Int

What is the role of a resolver in GraphQL?

• To create a new database.

• To define the schema structure.

• To specify the data types.

• To fetch data for a query.

Which parameter in a resolver function is used to access shared data across all resolvers?

• Context

• Arguments

• Info

• Object

What is the purpose of the Apollo server in the course project?

• To create a frontend application.

• To handle HTTP requests.

• To serve as a database.

• To implement GraphQL server functionalities.

What is the primary focus of the course project?

• Building a REST API.

• Creating a GraphQL server with Node.js.

• Developing a mobile application.

• Designing a SQL database.

Which of the following is NOT a JavaScript-based implementation of GraphQL?

• Apollo

• FetchQL

• Relay

• MySQL