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Frontend Software Engineer Interview Questions

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869 frontend software engineer interview questions shared by candidates

First round: Intro about yourself 1. que on HTML, css, js, react. 2.semantic elements, css position property, what is currying in js, hoisting, event loop. 3. interviewer presented some code snippets and we have to tell the output. 4. one react task was given which you have to do on any online compiler. task was to build custom react hook to fetch data from external api and to plot the data on UI as a list items. Second Round: Intro again about urself 1. que based on debouncing(like how you show items when user search with a particular keyword in search bar), polyfill array map function, 2. react task: like a to-do list where you have to provide a UI to user to enter the task to be done with having delete and edit functionality. 3. some questions on js and react (not remember exactly) Third round(in-person) intro 1. questions on HTML5(like what all new apis have been added), flexbox, grid(which one you choose), boxmodel, ssr, nextjs, webpack (like are you familiar with webpack, what it does, what is ssr) 2. spread and rest parameter, destructuring, asked to code binary search problem. HR round; intro 1. asked why you are leaving current company. 2. about wissen what you know. 3. about salary expectation. 4. any question from my side.
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Software Engineer (React/Frontend)

Interviewed at Wissen

3.9★
May 24, 2025

First round: Intro about yourself 1. que on HTML, css, js, react. 2.semantic elements, css position property, what is currying in js, hoisting, event loop. 3. interviewer presented some code snippets and we have to tell the output. 4. one react task was given which you have to do on any online compiler. task was to build custom react hook to fetch data from external api and to plot the data on UI as a list items. Second Round: Intro again about urself 1. que based on debouncing(like how you show items when user search with a particular keyword in search bar), polyfill array map function, 2. react task: like a to-do list where you have to provide a UI to user to enter the task to be done with having delete and edit functionality. 3. some questions on js and react (not remember exactly) Third round(in-person) intro 1. questions on HTML5(like what all new apis have been added), flexbox, grid(which one you choose), boxmodel, ssr, nextjs, webpack (like are you familiar with webpack, what it does, what is ssr) 2. spread and rest parameter, destructuring, asked to code binary search problem. HR round; intro 1. asked why you are leaving current company. 2. about wissen what you know. 3. about salary expectation. 4. any question from my side.

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