React Developer Interview Questions

3,481 react developer interview questions shared by candidates

Q. Hoisting ? Q. Promises ? Q. Execution order Q. let, var, and const difference ? Q. How to change parent from child component ? Q. Write down the code for fibonacci series. Q. A function to count every alphabet in a string Q. memo in React Q. forwardRef
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React Developer

Interviewed at Design Henge

4.2
Sep 30, 2023

Q. Hoisting ? Q. Promises ? Q. Execution order Q. let, var, and const difference ? Q. How to change parent from child component ? Q. Write down the code for fibonacci series. Q. A function to count every alphabet in a string Q. memo in React Q. forwardRef

1. Difference between synchronous and asynchronous code. 2. What is a Standalone Component? 3. How Tree Shaking Works? 4. Source control technologies. 5. How to deploy in the Deployment Platform. 6. If you want to store information while browsing a website what are different ways? 7. Can you send notification when broswer is closed? 8. What are service workers? 9. Tell about web sockets and what are the things that are avaible in market? 10. Apart from Promises, what are other ways to work with asynchronous code in JavaScript ? 11. What are promises in JS
avatar

React developer

Interviewed at Canarys Automations

3.7
Mar 19, 2025

1. Difference between synchronous and asynchronous code. 2. What is a Standalone Component? 3. How Tree Shaking Works? 4. Source control technologies. 5. How to deploy in the Deployment Platform. 6. If you want to store information while browsing a website what are different ways? 7. Can you send notification when broswer is closed? 8. What are service workers? 9. Tell about web sockets and what are the things that are avaible in market? 10. Apart from Promises, what are other ways to work with asynchronous code in JavaScript ? 11. What are promises in JS

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