API / GraphQL Interview Questions

How GraphQL uses the data loading process?

When the users fetch the data in GraphQL, it retrieves only the minimum amount of data that is required by the client. Even if the object model contains a lot of fields, the client can request only the required fields.

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What is GraphQL? Is GraphQL based on Database Technology? How GraphQL uses the data loading process? Advantages of GraphQL over REST API. What is Over-fetching in GraphQL? What is Under-fetching in GraphQL? How to perform Error Handling in GraphQL? What type of response you get using a GraphQL query? Advantages of GraphQL. Disadvantages of GraphQL. Explain GraphQL Schema. name: String! Is this a valid field type in GraphQL? What does an exclamation mark after a field's type indicate in GraphQL? What is SDL in GraphQL? What are the main operations that GraphQL supports? What is a mutation in GraphQL? Difference between a mutation and a query in GraphQL. What are scalar types in GraphQL? What is an exclamation point (!) in GraphQL? What are resolvers in GraphQL? Supported GraphQL Data types. How is GraphQL different from REST? What are the main components of GraphQL? What is a Subscription in GraphQL? What is N+1 Problem in GraphQL? What is DataLoader? What is Schema Stitching? What is Federation? How is Error Handling done in GraphQL? Is GraphQL strongly typed? What are Directives in GraphQL? What is the difference between Schema Stitching and Federation?

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