The video tutorial explains how to update a GraphQL query type to return a single user by creating a resolver function. It covers passing arguments to the query, handling non-nullable fields, and using console logs for testing. The tutorial demonstrates filtering users by ID using JavaScript's filter method and ensuring the correct data type is returned to meet GraphQL expectations.

What is the purpose of adding a resolver function for a user query in GraphQL?

• To specify the database connection

• To define the structure of the user type

• To handle the logic for fetching user data

• To manage user authentication

Which parameter is essential to specify when querying a single user in GraphQL?

• Name

• Email

• ID

• Address

In a resolver function, which parameter is typically not used when fetching a single user?

• Info

• Parent

• Context

• Arguments

What JavaScript feature is used to extract the ID from the arguments in a resolver function?

• Arrow Functions

• Template Literals

• Object Destructuring

• Array Destructuring

What method is used to filter users based on the ID in the resolver function?

• forEach()

• map()

• reduce()

• filter()

What is the main issue when returning an array instead of an object in a GraphQL query?

• It results in a timeout error

• It leads to a type mismatch error

• It causes a syntax error

• It triggers a security warning

How can the error of returning an array be resolved in a GraphQL query?

• By returning the first element of the array

• By returning the entire array

• By ignoring the error

• By converting the array to a string