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Senior Frontend Developer Interview Questions

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1,608 senior frontend developer interview questions shared by candidates

1st and 3rd Round - Basic questions : Difference between let,var, const, React Lifecycle, lifecycle hooks, redux flow, Promises, DOM, Virtual DOM, API workflow, this keyword, different datatypes 2nd Round - Live Coding given a array of numbers create a key value map of unique numbers Given a problem statement to create a react app to fetch data from and external API and show the images using urls in the data response. Should pay attention to good coding practices, so be prepared for questions while coding 4th Round: Relationship Round - Was asked a couple of personal questions
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Senior Frontend Developer

Interviewed at Brigosha Technologies

3.1★
Jan 9, 2022

1st and 3rd Round - Basic questions : Difference between let,var, const, React Lifecycle, lifecycle hooks, redux flow, Promises, DOM, Virtual DOM, API workflow, this keyword, different datatypes 2nd Round - Live Coding given a array of numbers create a key value map of unique numbers Given a problem statement to create a react app to fetch data from and external API and show the images using urls in the data response. Should pay attention to good coding practices, so be prepared for questions while coding 4th Round: Relationship Round - Was asked a couple of personal questions

The JavaScript question was this. Function foo = (a) => { Function biz => { Return a } this.bad => { Return a } ) Foo.prototype =function buzz (a) => { Return a } What will this return? How do you make it return the correct value. Foo.bizz() Foo.baz() Foo.buzz()
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Senior Frontend Developer

Interviewed at LinkedIn

3.8★
Jun 2, 2025

The JavaScript question was this. Function foo = (a) => { Function biz => { Return a } this.bad => { Return a } ) Foo.prototype =function buzz (a) => { Return a } What will this return? How do you make it return the correct value. Foo.bizz() Foo.baz() Foo.buzz()

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