React Developer Interview Questions

3,481 react developer interview questions shared by candidates

Output the below code? var objA = {prop1: 42}; var objB = objA; objB = {}; console.log(objA) ************************* var employeeId = '1234abe'; (function() { console.log(employeeId); var employeeId = '122345'; }()); ****************** .a.b .c span#qq ****************** .a > .b
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React Lead

Interviewed at BT Group

3.7
Jul 20, 2024

Output the below code? var objA = {prop1: 42}; var objB = objA; objB = {}; console.log(objA) ************************* var employeeId = '1234abe'; (function() { console.log(employeeId); var employeeId = '122345'; }()); ****************** .a.b .c span#qq ****************** .a > .b

As a react developer, there was a 30 mcq test based on JS and React. After clearing the test, in round 1 of interview i was asked a normal array question and 1-2 question on OOPs. In round 2 of interview, i was asked again a array question to code, 1 sql query, and Project discussion
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React Developer

Interviewed at ZopSmart

4.4
Mar 4, 2022

As a react developer, there was a 30 mcq test based on JS and React. After clearing the test, in round 1 of interview i was asked a normal array question and 1-2 question on OOPs. In round 2 of interview, i was asked again a array question to code, 1 sql query, and Project discussion

Explain when you use the useeffect hook, talk about react optimization stuff, explain js closures, scope, etc (most of them were tricky questions) and the interviewer felt like he was trying to disqualify my experience and knowledge
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Senior Frontend Engineer - React

Interviewed at Xebia

3.8
Dec 27, 2024

Explain when you use the useeffect hook, talk about react optimization stuff, explain js closures, scope, etc (most of them were tricky questions) and the interviewer felt like he was trying to disqualify my experience and knowledge

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