[Solved] A developer writes this GraphQL query to the single endpoint:{ user(id: 1) { name email } } but receives an error. What is the likely cause? | GraphQL

GraphQL - Basics and Philosophy

A developer writes this GraphQL query to the single endpoint:

{ user(id: 1) { name email } }

but receives an error. What is the likely cause?

AThe query must use mutation keyword

BThe id value should be a string, not a number

CGraphQL does not support querying user data

DThe endpoint URL is incorrect

Step-by-Step Solution

Solution:

Step 1: Check query syntax and types
The id argument is given as a number (1) but usually GraphQL expects string ids in quotes.
Step 2: Identify common GraphQL error
Passing wrong type causes validation error at the single endpoint.
Final Answer:
The id value should be a string, not a number -> Option B
Quick Check:
Argument types must match schema = id as string [OK]

Quick Trick: Always match argument types exactly in queries [OK]

Common Mistakes:

Master "Basics and Philosophy" in GraphQL

9 interactive learning modes - each teaches the same concept differently

More GraphQL Quizzes

A developer writes this GraphQL query to the single endpoint: