GraphQL - Schema Definition Language (SDL)
Which of the following is the correct way to declare a field of type ID in a GraphQL schema?
Which of the following is the correct way to declare a field of type ID in a GraphQL schema?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Understand GraphQL type syntax
Types are case-sensitive; ID must be uppercase and non-null indicated by !.Step 2: Check each option
userId: ID! uses correct type 'ID!' with uppercase and non-null. Others are either lowercase or wrong type.Final Answer:
userId: ID! -> Option DQuick Check:
ID type is uppercase and non-null with ! [OK]
Quick Trick: ID type is uppercase and ! means non-null [OK]
Common Mistakes:
- Using lowercase 'id'
- Confusing ID with String
- Omitting ! for required fields
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