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Why is it important to define both sides of a one-to-one relationship in GraphQL schema (e.g., User.profile and Profile.user)?

hard📝 Conceptual Q10 of 15
GraphQL - Type Relationships
Why is it important to define both sides of a one-to-one relationship in GraphQL schema (e.g., User.profile and Profile.user)?
AIt prevents circular references in the schema
BIt allows queries to navigate from either type to the other easily
CIt makes the schema smaller and simpler
DIt automatically creates database indexes
Step-by-Step Solution
Solution:

  1. Step 1: Understand bidirectional navigation

    Defining both sides lets clients query from either related type.

  2. Step 2: Evaluate other options

    The other options are incorrect because bidirectional fields do not prevent circular references, reduce schema size, or create indexes automatically.

  3. Final Answer:

    It allows queries to navigate from either type to the other easily -> Option B

  4. Quick Check:

    Bidirectional fields enable flexible querying [OK]
Quick Trick: Both sides enable easy navigation between related types [OK]
Common Mistakes:
  • Thinking bidirectional fields prevent circular references
  • Assuming bidirectional fields simplify schema size
  • Believing schema fields create database indexes

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