[Solved] Given the mutation below, what will be the output if the user with id 3 exists?mutation { updateUser(id: 3, name: "Anna") { id name } } | GraphQL

GraphQL - Mutations

Given the mutation below, what will be the output if the user with id 3 exists?

mutation { updateUser(id: 3, name: "Anna") { id name } }

A{ "data": { "updateUser": null } }

B{ "data": { "updateUser": { "id": 3, "name": "Anna" } } }

CSyntax error: missing brackets

DError: user id 3 not found

Step-by-Step Solution

Solution:

Step 1: Understand mutation behavior
If the user with id 3 exists, the mutation updates the name to "Anna" and returns the updated user data.
Step 2: Analyze the options
{ "data": { "updateUser": { "id": 3, "name": "Anna" } } } shows the updated user data correctly; others show errors or null.
Final Answer:
{ "data": { "updateUser": { "id": 3, "name": "Anna" } } } -> Option B
Quick Check:
Mutation updates and returns data [OK]

Quick Trick: Mutation returns updated data if item exists [OK]

Common Mistakes:

Master "Mutations" in GraphQL

9 interactive learning modes - each teaches the same concept differently

More GraphQL Quizzes

Given the mutation below, what will be the output if the user with id 3 exists?