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React Js Developer Interview Questions

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538 react js developer interview questions shared by candidates

Basic JavaScript questions as diff. between let , var & const , hoisting , temporal deadzone , closure , event loop, call(), apply(), and bind() methods , diff b/w map() & filter() ,how to change constant array. React JS questions such as component, Real DOM & Virtual DOM , React optimization techniques , Hooks - useRef() ,useEffect() , form validation , how to call API from frontend, Redux CSS3 questions such as pseudo classes , visibility:hidden-vs-opacity:0 , :not Selector HTML questions such as what is
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React Js Developer

Interviewed at Clover Infotech

3.2★
Jun 5, 2024

Basic JavaScript questions as diff. between let , var & const , hoisting , temporal deadzone , closure , event loop, call(), apply(), and bind() methods , diff b/w map() & filter() ,how to change constant array. React JS questions such as component, Real DOM & Virtual DOM , React optimization techniques , Hooks - useRef() ,useEffect() , form validation , how to call API from frontend, Redux CSS3 questions such as pseudo classes , visibility:hidden-vs-opacity:0 , :not Selector HTML questions such as what is

The interview has a total of lets say 3 stages, 1.Introduction 2.Questions on React like react routing,keys in react, etc. 3.To solve a problem ,Write a function that takes n number of arrays of integers and returns an array of distinct integers i.e the integers should appear only once among the input arrays. Example: [1,2,3], [2,3,4], [3,4,5] => [1,5]. Note: number of arrays can be n. The function should work when inputs are increased or decreased.
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React Js Developer

Interviewed at Codebuddy (India)

3.4★
Jul 5, 2024

The interview has a total of lets say 3 stages, 1.Introduction 2.Questions on React like react routing,keys in react, etc. 3.To solve a problem ,Write a function that takes n number of arrays of integers and returns an array of distinct integers i.e the integers should appear only once among the input arrays. Example: [1,2,3], [2,3,4], [3,4,5] => [1,5]. Note: number of arrays can be n. The function should work when inputs are increased or decreased.

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