Recap of GraphQL

GraphQL offers a flexible way to query and mutate data. The main difference between GraphQL and REST is that GraphQL allows clients to specify the data they need, whereas REST APIs return a fixed set of data. GraphQL treats data as a graph, and it uses a query language to define the shape of the data. This addresses the issues of over-fetching and under-fetching data by enabling clients to specify their data requirements. Additionally, it supports mutations, empowering clients to modify data as needed.

While REST APIs have multiple endpoints for different resources, GraphQL is typically served over a single endpoint, usually /graphql, which exposes a schema that describes the data. All queries and mutations are sent to this endpoint. The schema is defined using a GraphQL Schema Definition Language, which is the contract between the client and the server. The schema defines the types of data and the operations that can be performed on the data. The client can use...