Which statement best describes GraphQL usage?

Which statement best describes GraphQL usage?

• A. The practice of designing APIs around things that exist in your system (nouns) rather than actions.
• B. A query language API that uses a single endpoint where clients specify exactly the data they need.
• C. An RPC protocol that uses Protocol Buffers for binary serialization.
• D. A method of retrieving resources by a fixed URL path and HTTP method.

Answer: (B)

GraphQL is a query language for APIs that uses a single endpoint where clients specify exactly the data they need. This setup lets clients shape the response, pulling only the fields and nested resources they require, which helps avoid over-fetching and under-fetching. On the server side, a typed schema and resolver functions map those queries to the underlying data sources, returning precisely the requested structure. It differs from approaches that design APIs around nouns or actions, and it isn’t an RPC protocol using binary Protocol Buffers (that’s gRPC), nor is it a system that retrieves resources strictly by fixed URL paths and HTTP methods (that’s REST).

GraphQL is a query language for APIs that uses a single endpoint where clients specify exactly the data they need. This setup lets clients shape the response, pulling only the fields and nested resources they require, which helps avoid over-fetching and under-fetching. On the server side, a typed schema and resolver functions map those queries to the underlying data sources, returning precisely the requested structure. It differs from approaches that design APIs around nouns or actions, and it isn’t an RPC protocol using binary Protocol Buffers (that’s gRPC), nor is it a system that retrieves resources strictly by fixed URL paths and HTTP methods (that’s REST).