React Js Developer Interview Questions

React JS

Interviewed at Wipro

3.6★

Feb 23, 2024

React project related questions. Logical questions. react basic questions.

Node Js+React Developer

Interviewed at Persistent Systems

4.2★

May 7, 2021

Why do you want to join persistent?

React Js Developer

Interviewed at Capgemini

4.2★

Feb 6, 2024

1.Hoisting 2.Closures 3.Void elements in html 4.Virtual DOM in react comparison with Real DOM 5.What is ref,forward ref 6.let,const,var? 7.Array methods in JavaScript 8.Hooks in react 9.HTML5 and HTML old versions difference 10.ES6 features 11.Semantic tags in html 13.Write react code to display elements from an array 14.What is props and state in react 15.Higher order components in react 16.Why react? 17.What is JSX? 18.Event loop ?

Senior Frontend Developer-React JS

Interviewed at Persistent Systems

4.2★

Oct 7, 2024

First Round is a Hacker Rank Coding Questions which consists of few MCQ questions and two complete coding questions 1. Complete Javascript Problem 2. Complete React Problem statement

React Js Developer

Interviewed at Capgemini

4.2★

Oct 6, 2025

Implement the denouncing function, ans of null ===null, what is lazy loading, what is virtually dom

Senior Frontend Developer-React JS

Interviewed at Firstsource Solutions

4.1★

Jul 25, 2023

React.js, TypeScript, JavaScript, GraphQL - What is pureComponent ? - lifecycle methods - hooks - diff between useEffect & useLayoutEffect - portals - how do you make API calls - refs in React, when are they used ? - error handling - what is prop drilling ? - difference b/w createElement() & cloneElement - React Router Authentication & Authorization - how do you handle browser incompatibilities GraphQL: - what are benefits of using GraphQL - GraphQL queries & mutation - multiple queries in one request - REST API request methods GET, POST, PUT, PATCH, DELETE - error handling TypeScript - getter & setters - generics in TS - declare in TS, namespace - classes in TS - assert in TS

Full-stack Engineer (React, Node Js)

Interviewed at Persistent Systems

4.2★

Dec 25, 2021

Some basic javascript and reactjs questions

React Js Developer

Interviewed at Capgemini

4.2★

Sep 12, 2023

How React works Life Cycle hooks in React and its uses What is the use Effect hook and how it is used

React Js Developer

Interviewed at Capgemini

4.2★

Mar 29, 2021

Very bad experience as the interview didn't happen at all