First GraphQL query - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a GraphQL query?

A GraphQL query is a request sent to a GraphQL server to ask for specific data. It lets you specify exactly what information you want.

beginner

How do you write a simple GraphQL query to get a user's name and email?

You write it like this:<br>

{ user { name email } }

This asks for the user's name and email only.

beginner

Why is GraphQL called a 'query language'?

Because it lets you ask (query) for exactly the data you want from a server, unlike traditional APIs that send fixed data.

beginner

What does the curly braces {} mean in a GraphQL query?

Curly braces group fields you want to get. They show the shape of the data you want back.

beginner

Can a GraphQL query request multiple fields at once?

Yes! You can ask for many fields in one query by listing them inside curly braces.

What does a GraphQL query do?

A Requests specific data from a server

B Updates data on the server

C Deletes data from the server

D Creates a new database

A GraphQL query asks the server for specific data you want.

Which symbol groups fields in a GraphQL query?

A <> angle brackets

B [] brackets

C () parentheses

D {} curly braces

Curly braces {} group the fields you want in a GraphQL query.

How do you ask for a user's name and email in GraphQL?

A (user: name, email)

B { user { name email } }

C [user: name, email]

D <user>name,email</user>

The correct syntax uses curly braces to specify fields inside the user object.

Can a GraphQL query request multiple fields at once?

A Yes

B No

C Only one field per query

D Only if fields are related

GraphQL queries can request many fields together.

What is the main advantage of GraphQL queries over traditional APIs?

A They use less memory

B They are faster to write

C You get exactly the data you ask for

D They don't need a server

GraphQL lets you specify exactly what data you want, avoiding extra data.

Explain what a GraphQL query is and how it works.

Think about how you ask a friend for exactly what you want.

Write a simple GraphQL query to get a user's name and email.

Use { user { name email } } format.