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3,476 react interview questions shared by candidates

1) What type will return the function if an error occurs three. 2) Can be OOP applied to functional language 3) What difference are between props and state in React? 4) How many threads are in JavaScript? 5) What is redux and its main parts. 6) Describe SOLID 7) What is a difference between let, var and const 8) Describe what is a HOC 9) When do we use rebase in git
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React Developer Interview

Interviewed at Ergeon

4.6★
Jul 14, 2022

1) What type will return the function if an error occurs three. 2) Can be OOP applied to functional language 3) What difference are between props and state in React? 4) How many threads are in JavaScript? 5) What is redux and its main parts. 6) Describe SOLID 7) What is a difference between let, var and const 8) Describe what is a HOC 9) When do we use rebase in git

Third interview (whiteboard): Technical for 2 hours with two poor boys that had to listen to my blabering. :) Q1: You have an array with temperatures: [0, -5, 5, 1, 4, -3]. Return the closest temp to 0. If the array is empty: return 0. If the smallest temperature has a double in negative (3, and -3 per se), return the positive. Write this in Ruby language. Q2: You know how Redux works. We want to see your implementation of combineReducers function.
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React Developer

Interviewed at RELEX Solutions

4.3★
Jul 11, 2018

Third interview (whiteboard): Technical for 2 hours with two poor boys that had to listen to my blabering. :) Q1: You have an array with temperatures: [0, -5, 5, 1, 4, -3]. Return the closest temp to 0. If the array is empty: return 0. If the smallest temperature has a double in negative (3, and -3 per se), return the positive. Write this in Ruby language. Q2: You know how Redux works. We want to see your implementation of combineReducers function.

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