[Solved] Why does GraphQL execute nested resolvers after the parent resolver instead of all at once? — Ans: Because nested resolvers need parent data to resolve correctly | GraphQL

GraphQL - Type Relationships

Why does GraphQL execute nested resolvers after the parent resolver instead of all at once?

ABecause nested resolvers are optional and run only if parent fails

BBecause nested resolvers need parent data to resolve correctly

CBecause GraphQL does not support parallel execution

DBecause nested resolvers are defined outside the schema

Step-by-Step Solution

Solution:

Step 1: Understand dependency in nested resolvers
Nested resolvers rely on data returned by parent resolver to fetch related info.
Step 2: Explain execution order rationale
Executing parent first ensures nested resolvers have necessary context.
Final Answer:
Because nested resolvers need parent data to resolve correctly -> Option B
Quick Check:
Parent data needed first [OK]

Quick Trick: Nested resolvers depend on parent data [OK]

Common Mistakes:

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Why does GraphQL execute nested resolvers after the parent resolver instead of all at once?