Explain the logic behind the Binary Search and write a JavaScript program illustrating the same.
React Developer Interview Questions
3,040 react developer interview questions shared by candidates
what is virtual dom how to increase performance what is useeffct hook
HTML, CSS, JS, ReactJS,Redux, web workers, service workers, web storage, RTL, RWD, Caching Strategies, Typescript, web pack
1. Versions of React you have worked on and features of latest React version you have worked with? 2. All the hooks that you have used. Explain when to use useCallback. 3. How to manage state in React? 4. Custom hooks. Why use it? 5. What CSS preprocessors you have worked on? 6. Redux related questions. 7. Use of effects in Saga middleware. 8. Which library have you used for testing? Some basic questions. 9. Positions in CSS 10. Grid vs Flex 11. Semantic elements 12. JS questions ---------------- var a = [] function test(b) { a.push(b) return b } var a = [1,2,3] var b = a b.push(4) console.log(a) ---------------- let i; for (i = 0; i < 3; i++) { const log = () => { console.log(i); } setTimeout(log, 100); } ---------------------- var obj = { a: “John”, fun1: function () { console.log(this) } } obj.fun1() ----------------- var obj = { a: “John”, fun1: () => { console.log(this) } } obj.fun1() -------------------- 13. Create a timer/stopwatch using react.
What is generator function? What is reconciliation process.
Some of the question are what is header classes, immediate invoke function, inline cache, linking. execution context.
Adding features to existing code by adding event listeners
How Promise works? What is Promise.all. Write code for both.
General first-round question like self-introduction, why do you want to work here etc.
Q: What is bable and transpiler Q: what is jsx why we use it Q: what are difference between let,const and var
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