React Developer Interview Questions

3,481 react developer interview questions shared by candidates

- How do you make issue queries/mutations to a graphql server - how do you create graphql server ? What things you need ? - What is directive in graphql ? What is Fragment in GraphQL ? - How do you write unit tests for your Queries/Mutation (on server side) - TypeScript basics - Partial in TS - Decorators - union & discriminating unions - What are Generics in TS ? simple example - useCallback vs useMemo - call parent func from child component in React
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Senior Frontend Developer-React JS

Interviewed at Firstsource Solutions

4.1
Jul 25, 2023

- How do you make issue queries/mutations to a graphql server - how do you create graphql server ? What things you need ? - What is directive in graphql ? What is Fragment in GraphQL ? - How do you write unit tests for your Queries/Mutation (on server side) - TypeScript basics - Partial in TS - Decorators - union & discriminating unions - What are Generics in TS ? simple example - useCallback vs useMemo - call parent func from child component in React

Technical: Q: Write an ActiveRecord query for (<simple record selection>). Q: Talk me through how you would implement a hash map. Q: Write a React component that renders a simple HTML form. Behavioral: Q: Tell me about your background. Q: Do you prefer front end or back end work? Q: What do you like about Rails?
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Fullstack React + Ruby On Rails Engineer

Interviewed at Appthority

4.1
Feb 25, 2018

Technical: Q: Write an ActiveRecord query for (<simple record selection>). Q: Talk me through how you would implement a hash map. Q: Write a React component that renders a simple HTML form. Behavioral: Q: Tell me about your background. Q: Do you prefer front end or back end work? Q: What do you like about Rails?

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