React Developer Interview Questions

3,048 react developer interview questions shared by candidates

Difference between cookie, local storage and session storage. What is abstraction. How can you implement server sode rendering in react js. Concept of oops in react js. How to measure optimisation of application. Typescript.
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LEAD React Developer

Interviewed at Impetus Technologies

3.7
Dec 7, 2024

Difference between cookie, local storage and session storage. What is abstraction. How can you implement server sode rendering in react js. Concept of oops in react js. How to measure optimisation of application. Typescript.

1) What is useMemo in React? 2) What is useContext in React JS? 3) When does component Re-render? 4) What is the use of useCallback hook? 5) for(var i=0;i<5;i++){ setTimeout(()=>{ console.log()i; }); } What is the output of the above code? What changes do I need to make to get '0 1 2 3 4' as output. 6) Tell me about any challenge you came across while building a project and how did you solve it?
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React Developer

Interviewed at RioMed

2.7
Jun 26, 2023

1) What is useMemo in React? 2) What is useContext in React JS? 3) When does component Re-render? 4) What is the use of useCallback hook? 5) for(var i=0;i<5;i++){ setTimeout(()=>{ console.log()i; }); } What is the output of the above code? What changes do I need to make to get '0 1 2 3 4' as output. 6) Tell me about any challenge you came across while building a project and how did you solve it?

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