This GraphQL test evaluates a candidate’s ability to effectively work with, create, and maintain GraphQL APIs. This screening test will help you hire developers who can work with GraphQL on both the front and back end.

Developers can avoid over fetching data by using GraphQL to receive exactly the data they require in a single request. Developers can optimise data fetching and reduce round trips to the server because of the flexible nature.

Strong typing enhances API documentation and discoverability while also assisting in the detection of problems during development. Frontend developers can use GraphQL to request the precise data they require without having to rely on backend modifications. Because GraphQL enables subscriptions, developers can subscribe to the server's real-time updates. This is advantageous for tools like chat programs, real-time dashboards, or collaborative software that need real-time data. 

Developers can benefit from GraphQL's increased flexibility, performance improvement, improved teamwork, and improved developer experience.

This GraphQL test evaluates candidates’ abilities to use key GraphQL features, work with its type system and schemas, and perform validation, execution, and introspection within GraphQL.

This screening test will help you identify GraphQL developers who understand the ideas behind GraphQL and how to implement them correctly in realistic situations. Candidates who do well on this test will develop reliable, efficient GraphQL APIs.