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What is the main purpose of using enum types in GraphQL schemas?

easy📝 Conceptual Q11 of 15
GraphQL - Schema Definition Language (SDL)
What is the main purpose of using enum types in GraphQL schemas?
ATo allow any string value for a field
BTo create a numeric range for a field
CTo define a list of objects
DTo restrict a field to a fixed set of allowed values
Step-by-Step Solution
Solution:

  1. Step 1: Understand enum purpose

    Enums limit a field to specific predefined values, ensuring data consistency.

  2. Step 2: Compare options

    Only To restrict a field to a fixed set of allowed values describes restricting values to a fixed set, which is the enum's role.

  3. Final Answer:

    To restrict a field to a fixed set of allowed values -> Option D

  4. Quick Check:

    Enum = fixed allowed values [OK]
Quick Trick: Enums fix allowed values, not free text or ranges [OK]
Common Mistakes:
  • Thinking enums allow any string
  • Confusing enums with lists or objects
  • Assuming enums define numeric ranges

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