[Solved] Why does GraphQL require explicit field selection instead of returning all fields by default? — Ans: To reduce data transfer and improve performance by fetching only needed data | GraphQL

GraphQL - Queries

Why does GraphQL require explicit field selection instead of returning all fields by default?

ATo reduce data transfer and improve performance by fetching only needed data

BBecause the server cannot access all fields

CTo force clients to write longer queries

DBecause GraphQL does not support nested data

Step-by-Step Solution

Solution:

Step 1: Understand GraphQL design goals
GraphQL aims to optimize data transfer by letting clients specify exactly what they need.
Step 2: Evaluate incorrect options
Server can access all fields, clients prefer concise queries, and GraphQL supports nested data.
Final Answer:
To reduce data transfer and improve performance by fetching only needed data -> Option A
Quick Check:
Explicit selection = Efficient data fetching [OK]

Quick Trick: Explicit fields reduce data size and speed up queries [OK]

Common Mistakes:

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Why does GraphQL require explicit field selection instead of returning all fields by default?