API / GraphQL Interview Questions
Explain GraphQL Schema.
A schema is like a contract between the server and the client. It defines what a GraphQL API can and can't do, and how clients can request or change data. It's an abstraction layer that provides flexibility to consumers while hiding backend implementation details.
A GraphQL Schema Definition Language (SDL) is the most concise way to specify a GraphQL schema. A schema is a collection of object types that contain fields. Each field has a type of its own. A field's type can be scalar (such as an Int or a String), or it can be another object type. For example, the Book object type will have an author field of type Author.
type Book{ id: Int authors: [Author] isbn: String! }
"Author of book(s)" type Author { id: ID! "Author's first and last name" name: String! "Author's profile picture url" photo: String }
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