React Developer Interview Questions

3,476 react developer interview questions shared by candidates

Telephonic Round - What is javascript Is javascript synchronous or asynchronous Will react hook use in class components. Purpose of useEffect What are Fragments in React? How can we loop inside JSX Technical Round - Higher order component Diff bet Callback & promises What is SEO & how do you perform SEO What is useMemo,useEffect,useCallback What is Redux & why use use it Alternative of Redux React Context API
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React Developer

Interviewed at NeoSOFT

3.6
Jan 11, 2023

Telephonic Round - What is javascript Is javascript synchronous or asynchronous Will react hook use in class components. Purpose of useEffect What are Fragments in React? How can we loop inside JSX Technical Round - Higher order component Diff bet Callback & promises What is SEO & how do you perform SEO What is useMemo,useEffect,useCallback What is Redux & why use use it Alternative of Redux React Context API

L1: React basics, lifecycle methods,state vs props,var/let/ const, hoisting,closures, spread vs rest operator, html methods, react js api, resume questions L2: print next palindrome of a given number, print first n prime numbers, print n fibonacci series, React progress bar that updates every 1 sec till it reaches max screen width, print possible combinations of a string and identify if it has a palindrome in it.
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React Js Developer

Interviewed at NeoSOFT

3.6
Jul 24, 2022

L1: React basics, lifecycle methods,state vs props,var/let/ const, hoisting,closures, spread vs rest operator, html methods, react js api, resume questions L2: print next palindrome of a given number, print first n prime numbers, print n fibonacci series, React progress bar that updates every 1 sec till it reaches max screen width, print possible combinations of a string and identify if it has a palindrome in it.

L1: css positions, props, virtual dom, functional components, class components, difference between them, Hoisting, promises, promises.all, es6 functions, props drilling, context api, redux, difference between class and functional, callback, diff let, var and const, css properties, git stash, cherrypick, reducers, setState, hooks, spread operator, rest operator, diff between both, react optimization, error boundaries, closures L2: Q1. Implement progressbar which keeps incrementing after every 10s to 10px till it reaches browser width. Q2. Write a function to print n prime number eg. n=5 print 5 prime numbers eg: 2,3,5,7,9 etc. Q3: Write a program to shuffle string 'sadads' in all possible patterns and find the palidrome in it.
avatar

React Js Developer

Interviewed at NeoSOFT

3.6
Mar 29, 2022

L1: css positions, props, virtual dom, functional components, class components, difference between them, Hoisting, promises, promises.all, es6 functions, props drilling, context api, redux, difference between class and functional, callback, diff let, var and const, css properties, git stash, cherrypick, reducers, setState, hooks, spread operator, rest operator, diff between both, react optimization, error boundaries, closures L2: Q1. Implement progressbar which keeps incrementing after every 10s to 10px till it reaches browser width. Q2. Write a function to print n prime number eg. n=5 print 5 prime numbers eg: 2,3,5,7,9 etc. Q3: Write a program to shuffle string 'sadads' in all possible patterns and find the palidrome in it.

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