Which of the following is the correct syntax to define an input argument named input of type UserInput in a mutation?

easy📝 Syntax Q3 of 15

GraphQL - Mutations

Which of the following is the correct syntax to define an input argument named input of type UserInput in a mutation?

AupdateUser(input: UserInput): User

BupdateUser(input UserInput): User

CupdateUser(input: UserInput!) : User

DupdateUser(input = UserInput): User

Step-by-Step Solution

Solution:

Step 1: Understand GraphQL argument syntax
Arguments are defined as name: Type, with optional ! for required.
Step 2: Analyze options
updateUser(input: UserInput!) : User correctly uses input: UserInput! meaning input is required. Others have syntax errors or missing colon.
Final Answer:
updateUser(input: UserInput!) : User -> Option C
Quick Check:
Argument syntax = name: Type! [OK]

Quick Trick: Use colon and ! for required input arguments [OK]

Common Mistakes:

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