Which of the following is the correct syntax to declare a variable named $userId of type ID! in a GraphQL query?

easy📝 Syntax Q3 of 15

GraphQL - Queries

Which of the following is the correct syntax to declare a variable named $userId of type ID! in a GraphQL query?

Aquery getUser { user(id: $userId: ID!) { name } }

Bquery getUser($userId ID!) { user(id: $userId) { name } }

Cquery getUser($userId: ID!) { user(id: $userId) { name } }

Dquery getUser($userId: ID) { user(id: $userId!) { name } }

Step-by-Step Solution

Solution:

Step 1: Review correct variable declaration syntax
Variables are declared in parentheses after query name with format ($name: Type!).
Step 2: Check each option for syntax correctness
Only query getUser($userId: ID!) { user(id: $userId) { name } } follows the correct syntax with $userId: ID! inside parentheses.
Final Answer:
query getUser($userId: ID!) { user(id: $userId) { name } } -> Option C
Quick Check:
Variable declaration syntax = correct parentheses and colon [OK]

Quick Trick: Declare variables inside parentheses with colon and type [OK]

Common Mistakes:

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