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8,918 frontend software engineer interview questions shared by candidates

Durante la entrevista, me consultaron sobre mi situación laboral actual, los proyectos más desafiantes en los que he trabajado y mi experiencia en roles de liderazgo, ya sea liderando equipos o trabajando como líder de equipo.
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Frontend Developer

Interviewed at BairesDev

4.2★
Feb 6, 2025

Durante la entrevista, me consultaron sobre mi situación laboral actual, los proyectos más desafiantes en los que he trabajado y mi experiencia en roles de liderazgo, ya sea liderando equipos o trabajando como líder de equipo.

Given an array of ranges [x,y] Return array of groups, each group will hold an array of the overlapping ranges. By range [x,y] we mean all the numbers between x and y. For example [2,5] - all the numbers between 2 and 5. Example: [[6,9], [2,5], [3,4], [1,3]] => [ [[1,3], [2,5], [3,4]], [[6,9]] ] [[2,6], [8,10], [5,7], [1,3], [10,15], [20,30], [25,27], [30,100]] => [ [[2,6], [5,7], [1,3]], [[8,10], [10,15] ],[[20,30], [25,27], [30,100]]]
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Frontend Developer

Interviewed at Axonius

3.8★
May 27, 2025

Given an array of ranges [x,y] Return array of groups, each group will hold an array of the overlapping ranges. By range [x,y] we mean all the numbers between x and y. For example [2,5] - all the numbers between 2 and 5. Example: [[6,9], [2,5], [3,4], [1,3]] => [ [[1,3], [2,5], [3,4]], [[6,9]] ] [[2,6], [8,10], [5,7], [1,3], [10,15], [20,30], [25,27], [30,100]] => [ [[2,6], [5,7], [1,3]], [[8,10], [10,15] ],[[20,30], [25,27], [30,100]]]

1 What is the essence of Reducer in react @@ What is middleware in react.@@ What are the type of js 4 What's the greatest usage in js. What is the data structure that you use most often in your work @@ 6 What can make "unsynchronized" look like "synchronized" 7. what's difference between "display" and "visibility".
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Senior Frontend Developer

Interviewed at Scotiabank

3.8★
Oct 16, 2021

1 What is the essence of Reducer in react @@ What is middleware in react.@@ What are the type of js 4 What's the greatest usage in js. What is the data structure that you use most often in your work @@ 6 What can make "unsynchronized" look like "synchronized" 7. what's difference between "display" and "visibility".

Max was a wise ruler. They wanted to know if the neighboring kingdom's king was indeed humble. They asked him if he knew the'answers to all of their questions. The king responded that one of the things he was sure of was that he did not know everything. Is the above description consistent?
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React Frontend Software Engineer

Interviewed at Capital.Com

4.3★
Jan 14, 2025

Max was a wise ruler. They wanted to know if the neighboring kingdom's king was indeed humble. They asked him if he knew the'answers to all of their questions. The king responded that one of the things he was sure of was that he did not know everything. Is the above description consistent?

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