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What does a one-to-one relationship in GraphQL represent?

easy📝 Conceptual Q11 of 15
GraphQL - Type Relationships
What does a one-to-one relationship in GraphQL represent?
AEach item in one type is linked to exactly one item in another type.
BEach item in one type can link to many items in another type.
CItems are not linked between types.
DOne item links to zero or many items in the same type.
Step-by-Step Solution
Solution:

  1. Step 1: Understand relationship types

    One-to-one means each item in one set matches exactly one item in another set.

  2. Step 2: Apply to GraphQL context

    In GraphQL, this means a field in one type points to exactly one item in another type.

  3. Final Answer:

    Each item in one type is linked to exactly one item in another type. -> Option A

  4. Quick Check:

    One-to-one = single matching pair [OK]
Quick Trick: One-to-one means exactly one match per item [OK]
Common Mistakes:
  • Confusing one-to-one with one-to-many
  • Thinking items can link to multiple items
  • Assuming no links exist

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