Senior Frontend Developer Interview Questions

1,607 senior frontend developer interview questions shared by candidates

A junior developer changes the color of a button on a page. All unit and end-to-end tests pass, and you deploy the code to production. However, something goes wrong in production. How could you have caught this issue before going live?
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Senior Frontend Developer

Interviewed at Insider One

4.3
Jun 28, 2025

A junior developer changes the color of a button on a page. All unit and end-to-end tests pass, and you deploy the code to production. However, something goes wrong in production. How could you have caught this issue before going live?

Q4. Based on my answer to the question above, he mentioned this code? - He said, that you are saying javascript is async. then what will be the output of this code console.log("a") Promise. execution() console.log("b") Will it wait to resolve promise or it will execute parallely ?
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Senior Frontend Developer

Interviewed at GlobalLogic

3.8
Sep 27, 2022

Q4. Based on my answer to the question above, he mentioned this code? - He said, that you are saying javascript is async. then what will be the output of this code console.log("a") Promise. execution() console.log("b") Will it wait to resolve promise or it will execute parallely ?

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