API / GraphQL Interview Questions

Difference between a mutation and a query in GraphQL.

In GraphQL, mutations are used to write or change data, while queries are used to read data. Queries are used for operations that do not have side effects, such as data retrieval, while mutations are used for operations that can modify data (CRUD operations), such as those that create, update, or delete records.

More Related questions...

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?

Show more question and Answers...

Docker Interview questions

	Interviews Questions Java Spring Hibernate DevOps Testing API BigData Web Erlang AI Database Integration Cloud Python Scala Tools Golang SAP	About Javapedia.net Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples. This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company. Follow Javapedia updates
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2026, javapedia.net, all rights reserved. Privacy Policy · Terms of Service.

API / GraphQL Interview Questions

Difference between a mutation and a query in GraphQL.

Comments & Discussions

Recently added questions