React Js Developer Interview Questions

475 react js developer interview questions shared by candidates

You had to integrate with their haveibeenpwned endpoint and filter based on given criteria, as well deal with API errors. Another challenge was to make a react alert component that had a dismiss alert button, changed color based on alert, and rendered the compromised accounts.
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React Js Developer

Interviewed at LifeOmic

4.7
Jul 18, 2020

You had to integrate with their haveibeenpwned endpoint and filter based on given criteria, as well deal with API errors. Another challenge was to make a react alert component that had a dismiss alert button, changed color based on alert, and rendered the compromised accounts.

1. Explain the Virtual DOM, and a pragmatic overview of how React renders it to the DOM. 2. Compare and contrast incorporating mixins and enforcing modularity in React Components. (extend, createClass and mixins, HOCs) 3. How might React handle or restrict Props to certain types, or require certain Props to exist? then 4. UI Teach round, mostly questions on pure js concepts, Promise, Clousure, Recursion, CSS position property, call bind apply
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React Js Developer

Interviewed at Nicobar

4.1
Oct 7, 2018

1. Explain the Virtual DOM, and a pragmatic overview of how React renders it to the DOM. 2. Compare and contrast incorporating mixins and enforcing modularity in React Components. (extend, createClass and mixins, HOCs) 3. How might React handle or restrict Props to certain types, or require certain Props to exist? then 4. UI Teach round, mostly questions on pure js concepts, Promise, Clousure, Recursion, CSS position property, call bind apply

1.Tell me about yourself 2. what is the difference between functional and class component? 3. how do you update between sibling components in react? 4. what is closure? 5. what is promise? 6. what is the spread operator? 7. what is destructuring? 8. how do define array and object values? 9. difference between the arrow function and the traditional function? 10. how do you access array and object values? 11. difference between var, let, and const?
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React Js Developer

Interviewed at Inncrewin Technologies

4.6
May 25, 2021

1.Tell me about yourself 2. what is the difference between functional and class component? 3. how do you update between sibling components in react? 4. what is closure? 5. what is promise? 6. what is the spread operator? 7. what is destructuring? 8. how do define array and object values? 9. difference between the arrow function and the traditional function? 10. how do you access array and object values? 11. difference between var, let, and const?

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