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Ui Developer Front End Developer Interview Questions

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3,529 ui developer front end developer interview questions shared by candidates

- Create a triangle with CSS -Use of semantic tags in HTML5 -Use of meta tag 'viewport' and why we use initial scale =1 -Questions on media queries -Can we create a 20 column layout with bootstrap's 12 grid layout -CSS box model. If we want to increase padding or border without increasing overall size of the div, how to achieve it? - how to position a div exactly at center of the screen without knowing it's dimensions - write JavaScript code to input 2 strings and output string should take one character from each of those strings alternately. For eg input1 = "abc", input2="wxyz", then rqeuired output = "awbxcyz" - what is eventpropagation and eventhandling
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UI Developer

Interviewed at Cognizant

3.1★
Apr 12, 2019

- Create a triangle with CSS -Use of semantic tags in HTML5 -Use of meta tag 'viewport' and why we use initial scale =1 -Questions on media queries -Can we create a 20 column layout with bootstrap's 12 grid layout -CSS box model. If we want to increase padding or border without increasing overall size of the div, how to achieve it? - how to position a div exactly at center of the screen without knowing it's dimensions - write JavaScript code to input 2 strings and output string should take one character from each of those strings alternately. For eg input1 = "abc", input2="wxyz", then rqeuired output = "awbxcyz" - what is eventpropagation and eventhandling

Let’s say you have a React component that you are currently using in one application. You now want to reuse the same component in another application. How would you structure this so that the component can be shared and used across multiple apps? This is another interview question that was clearly very clear in the interviewer’s mind, but came out quite vague verbally. However, it’s possible to guess what they were trying to ask.”
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UI Developer

Interviewed at Barclays

4★
Nov 13, 2025

Let’s say you have a React component that you are currently using in one application. You now want to reuse the same component in another application. How would you structure this so that the component can be shared and used across multiple apps? This is another interview question that was clearly very clear in the interviewer’s mind, but came out quite vague verbally. However, it’s possible to guess what they were trying to ask.”

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