Top 31 Ui Developer Interview Questions You Must Prepare 19.May.2024

static, absolute, fixed, relative, inherit.

Modal, Dropdown, Scrollspy, Tab, Tooltip, Popover, Alert, Button, Collapse, Carousel, Affix.

A JavaScript Framework/Library that make things like DOM selection/manipulation, AJAX, and animation, easier.

HTML using markup that also conveys the containing content. HTML5 has more semantic tags than prior versions (nav | aside | article | header | footer), but using descriptive classes and id’s could also be an example of semantic markup.

include() will raise a warning if it fails, require() will raise a fatal error.

!DOCTYPE html | html | body | head | (title kind-of)

canvas | audio | svg | header | footer | aside | article | nav | section etc…

/* This is a comment block */ 
//This is a commented out line 

Asynchronous JavaScript and XML. Client side process used for GET, POST etc to get new data without having to refresh the page.

Looking for common debugging practices like W3c validator, Firebug, Chrome Dev Tools.

CSS Reset removes browser default styles. Normalize.css sets a standard across all browsers (It does not ‘reset’ them).

Add bootstrap.css/bootstrap.js link and script in the head of the HTML document *bonus if bootstrap.js script included in the footer (better for page loading).

var colors = [‘red, ‘yellow’, ‘green’, ‘blue’];
for( var i = 0; i < colors.length; i++ )


  <script src="main.js"></script> 
  <link href="style.css" rel="stylesheet"></link>

As the name suggest UI / UX stands for User Interface Design or User Experience Design. The role of UI / UX developer is to focus on the way the functionality is displayed and the detail on how users interact with the users.  They code for the functioning of the front end interface or User Interface.