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In GraphQL, which relationship design pattern best represents a single entity connected to exactly one other entity?

easy📝 Conceptual Q1 of 15
GraphQL - Type Relationships
In GraphQL, which relationship design pattern best represents a single entity connected to exactly one other entity?
AOne-to-Many
BMany-to-Many
COne-to-One
DNo Relationship
Step-by-Step Solution
Solution:

  1. Step 1: Understand relationship types

    One-to-One means each item in one type relates to exactly one item in another type.

  2. Step 2: Match definition to pattern

    Since the question asks for a single entity connected to exactly one other, this matches One-to-One.

  3. Final Answer:

    One-to-One -> Option C

  4. Quick Check:

    Relationship type = One-to-One [OK]
Quick Trick: One-to-One means exactly one related item [OK]
Common Mistakes:
  • Confusing One-to-One with One-to-Many
  • Thinking Many-to-Many means one item
  • Ignoring relationship direction

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