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React Developer Interview Questions
3,046 react developer interview questions shared by candidates
Why to use React over Vanilla JavaScript?
1. How will you create a react element without JSX? 2. const a = [1, 2, 3] const b = a.filter(ele=>ele*2) console.log(b); Output: [ 1, 2, 3 ] 3. 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. solution: function distinctVeal(arr){ let str=[]; for(let i=0;i
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.
Requirements: build a carousel. by default display 4 blocks at once. navigation is made with next and previous buttons. Next button should be disabled, if user is at the very end of the carousel. Previous button should be disabled, if user is at the very beginning of carousel. Clicking on next/previous buttons shows next/prev 4 carousel blocks accordingly. The source of carousel block is endpoint on server that return following JSON: [{ title: "First Block", images: [url1, url2, url3] }, { title: "Second Block", images: [url7, url8] } ,...] Display a random image for each block from the set of images.
Describe the bridge in react native and native code
brief about in which stack you have worked
What is useEffect hook? what is semantic HTML? how do you make websites accessible? General culture fit, can you work collaboratively, etc?
React Lifecycle methods Error Boundaries Parameter routing Closures,Call bind apply,Event loop,Create a timer,Create modal using portals
They ask regarding my studies and skills
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