[Solved] Given this schema snippet:type Query { book(id: ID!): Book }and a query:{ book(id: "1") { title } }What will the API return if the book with id "1" exists? | GraphQL

GraphQL - Schema Definition Language (SDL)

Given this schema snippet:

type Query { book(id: ID!): Book }

and a query:

{ book(id: "1") { title } }

What will the API return if the book with id "1" exists?

AThe title of the book with id "1"

BAn error because id is not an Int

CA list of all books ignoring the id

DNull because the schema is incomplete

Step-by-Step Solution

Solution:

Step 1: Understand the schema and query
The schema defines a Query type with a 'book' field taking a non-null ID argument and returning a Book.
Step 2: Analyze the query execution
The query requests the book with id "1" and asks for its title. If the book exists, the API returns its title.
Final Answer:
The title of the book with id "1" -> Option A
Quick Check:
Valid id query returns book title = A [OK]

Quick Trick: Non-null ID means id must be provided and valid [OK]

Common Mistakes:

Master "Schema Definition Language (SDL)" in GraphQL

9 interactive learning modes - each teaches the same concept differently

More GraphQL Quizzes

Given this schema snippet: