What is GraphQL?

• A query language for REST APIs

• A query language for graph-based APIs

• A framework for database development

• A general-purpose programming language

What is the main difference between REST and GraphQL?

• GraphQL allows retrieving multiple resources in a single request

• REST allows performing complex queries on databases

• GraphQL is faster than REST

• REST is only compatible with JavaScript

What does the term "Schema" mean in GraphQL?

• A representation of the database

• A configuration file for queries

• The definition of data types, queries, and mutations

• A description of business logic

What are scalar types in GraphQL?

• Types that can contain multiple sub-types

• Basic types like String, Int, Float, Boolean, and ID

• Types that define resolution functions

• Types specific to mutations

How do you define a GraphQL schema with Apollo Server in Node.js?

• Use graphql-tools to generate a schema based on YAML files.

• Define a schema using typeDefs that represent types, queries, and mutations, then associate it with resolvers.

• Use JSON files to describe the types.

• Define schemas only with simple JavaScript objects.

What is a "resolver" in Apollo Server?

• An object containing data

• A function that resolves the values of a field in a query

• A file that defines the structure of the schema

• A means of filtering data in the database

What is a "resolver" in Apollo Server?

• It is a function that resolves user queries in the application.

• It is a function that generates schemas for REST APIs.

• It is a function that associates a field of a GraphQL type with a data source, often a database or an external service.

• It is a function that performs calculations on the data sent by the user.

What are the correct statements about the structure of the resolvers object?

• The Query and Mutation types in the schema must have corresponding keys in the resolvers object

• The resolvers object can contain a maximum of 10 resolver functions

• The names of the resolver functions must match the names of the fields in the schema

• The resolver functions can have any name

What is the AST (Abstract Syntax Tree) in GraphQL?

• A tree that defines the schema of data types

• A tree representation of the structure of a GraphQL query after it has been validated

• A tool for generating Apollo server code

• A list of data that will be sent to the GraphQL server

What is the purpose of a "query" in GraphQL?

• Modify data on the server

• Retrieve data from the server

• Add data to the database

• Manage authentication and permissions