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What scalar type should you use in GraphQL to uniquely identify an object?

easy📝 Conceptual Q2 of 15
GraphQL - Schema Definition Language (SDL)
What scalar type should you use in GraphQL to uniquely identify an object?
AInt
BString
CID
DBoolean
Step-by-Step Solution
Solution:

  1. Step 1: Recall the purpose of the ID scalar type

    ID is a special scalar type used to represent unique identifiers for objects.

  2. Step 2: Compare with other scalar types

    String and Int can hold text or numbers but do not guarantee uniqueness. Boolean is for true/false only.

  3. Final Answer:

    ID -> Option C

  4. Quick Check:

    ID = A [OK]
Quick Trick: Use ID for unique object identifiers [OK]
Common Mistakes:
  • Using String instead of ID
  • Using Int for unique IDs
  • Confusing Boolean with ID

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