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Why is GraphQL preferred for API Gateway to backend services communication?

It’s not clear why GraphQL is preferred in this scenario. IoT devices/mobile phones aren’t the most common clients for leetcode like system. Could someone describe the kind of responses clients expect from GraphQL in this system?


Course: Grokking the API Design Interview - Learn Interactively
Lesson: LeetCode API Design Decisions - Grokking the API Design Interview

Hi Harish,

The LeetCode service consists of several interconnected subservices, each managing distinct functionalities such as user data, problem handling, contests, interviews, and discussions. GraphQL empowers clients to execute queries, fetching precisely the data they require from multiple sources in a single request, thereby eliminating the need for multiple server round-trips.

Numerous other reasons underscore the importance of GraphQL in this scenario.

Thanks.