Javascript Engineer Interview Questions

1,561 javascript engineer interview questions shared by candidates

Towards the end of the interview another member of staff joined the process. He only asked one question. Given five large tech companies (Google, Microsoft, IBM Apple and Tesla) which one would I get rid of (or something to that effect). I was bewildered by this question. I really did not understand how this was a relevant question...even a "Tell me about a time when you had to overcome a problem" type question would have been more constructive.
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JavaScript Developer

Interviewed at Yoti

3.8
Feb 3, 2017

Towards the end of the interview another member of staff joined the process. He only asked one question. Given five large tech companies (Google, Microsoft, IBM Apple and Tesla) which one would I get rid of (or something to that effect). I was bewildered by this question. I really did not understand how this was a relevant question...even a "Tell me about a time when you had to overcome a problem" type question would have been more constructive.

1. What BOM? 2. What are Web and Service Workers? 3. Some CSS puzzles to solve in flexbox? 4. Difference b/w async and differ? 5. What is event propagation 6. What is the difference between stopPropagation and stopImmidatePropagation? 7. What is the difference b/w 'div' and 'section'? 8. What are pseudo-classes and pseudo-elements? 9. What is the difference b/w React.Component and React.PureComponent? 10. What is the difference b/w 'for..in' and 'for..of' loops?
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Javascript Engineer

Interviewed at Nagarro

3.9
Aug 23, 2024

1. What BOM? 2. What are Web and Service Workers? 3. Some CSS puzzles to solve in flexbox? 4. Difference b/w async and differ? 5. What is event propagation 6. What is the difference between stopPropagation and stopImmidatePropagation? 7. What is the difference b/w 'div' and 'section'? 8. What are pseudo-classes and pseudo-elements? 9. What is the difference b/w React.Component and React.PureComponent? 10. What is the difference b/w 'for..in' and 'for..of' loops?

1. How you maintain the centralize data storage in react ? 2. Write an array of numbers, print the unique values of array 3. Write a program to Sum all the numbers of array, 4. How to fetch the values from the store 5. Tell me about some hooks 6. #id_abc{color:yellow } .abc{color: red} div{color:blue} Which CSS will be applicable for div. <div id="id_abc" class="abc">Test</div> 7. One Javascript question on button click. 8. Error boundaries in component.
Apr 21, 2022

1. How you maintain the centralize data storage in react ? 2. Write an array of numbers, print the unique values of array 3. Write a program to Sum all the numbers of array, 4. How to fetch the values from the store 5. Tell me about some hooks 6. #id_abc{color:yellow } .abc{color: red} div{color:blue} Which CSS will be applicable for div. <div id="id_abc" class="abc">Test</div> 7. One Javascript question on button click. 8. Error boundaries in component.

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