UI Developer

A qUIck method for dividing workloads among several servers or clusters is load balancing. Round Robin is the most widely used and basic load balancing method. This method of load balancing divides requests in a circular pattern to ensure that each computer receives an equal amount of requests and is neither overburdened nor underloaded. 

Load balancing is intended to 

• Improve resource use (avoid overload and under-load of any machines) 
• Obtain the Highest Throughput 
• Reduce reaction time. 

The strategies for load balancing used by web applications most often include 

• "Round robin" 

Sticky session, IP Address affinity or session affinity 

These are the top UI developer interview questions and answers. 

KISS, an acronym for "keep things simple, stupid," is a design gUIdeline established by the United States Navy in 1960. According to the KISS principle, most systems perform best when they are maintained simple rather than convoluted; hence, simplicity should be a fundamental aim in design, and needless complexity should be avoided. 

span (an inline element) while div (a block element). 

You may also mention that this is unacceptable to put a block element inside an inline element, and that although div can have a p tag and a p tag can have a span, span cannot have a div or a p tag inside. 

One of the most frequently posed senior UI Developer interview questions, be ready for it.

An interpreted programming language with object-oriented features, JavaScript. It is portable. It enables one to add interaction to HTML pages that would otherwise be static. 

The most popular front-end development languages are Javascript and React.js. 

Additionally, backend development tools like Node.js, Nest.js, Next.js, etc. are used. 

Javascript has a number of features, including: 

• It is a simple, interpreted programming language. 
• The development of network-centric applications is its intended use. 
• It complements Java and is linked with it. 
• It complements HTML and is connected with it. 
• It is a free, universal programming language. 

If you are preparing for some big companies, then here you get important senior UI developer interview questions. 

The technique to indicate how a web page is organized is through the HTML layout. 

The following list of HTML5 elements is used to define the various webpage components: 

• This section's <header> specifies a heading for a page or a section.
• <Nav>: describes a container for navigation links. 
• <section>: Definition of a Section in a Document:
• <Article>:An Independent, Self-Contained Article 
• A sidebar is an example of an <aside> from the content.
• A document's <footer>is specified here. 
• Sometimes you can be asked to explain the terms or write code in UI interview questions for experienced.

Block components always begin on a new line and occupy the whole width of the container. 

It enlarges itself to fill the container's available width. Some instances of the elements at the block level include <div>, <p>, <img>, <section> 

Only the width needed to fit the element inside the container is necessary for inline elements. 

Take the text flow on the page as an example as we attempt to comprehend. The text wraps onto a new line after one line has filled the whole width of the container, and so on. 

The inline element will only occupy the width or amount of space that is reqUIred for it. a few instances are <span>, <label>, <a>, <b> 

UI development interview questions mostly have this

This is among the often requested UI Developer Interview Questions. 

After declaring the variables in JavaScript, we may access them. 

When a variable is declared at the end of a script but used earlier, JavaScript produces an error stating that the variable is undefined. 

Before any code is executed in Javascript, assignment variables and function declarations are "hoisted" to the top of their scope. 

Therefore, regardless of whether a function has a local or global scope, it is relocated to the top of its range. 

Semantic components should be used since they make the code easier to read. 

When examining the initial piece of code using semantic components, it is the item that stands out as being the most significant. It's a short, straightforward example, but as a programmer, you may read hundreds or thousands of lines of code, so readability is crucial. The developer's work is made considerably simpler if the code is simpler to read and comprehend. 

Additionally, a code having semantic components is more accessible. 

When semantic features are employed, search engines and assistive technology (such as screen readers for individuals with vision impairments) are also better eqUIpped to comprehend the context and content of your website. As a consequence, website visitors get a better overall experience. 

Overall, using semantic components results in more consistently written code. 

Various programmers (since they have different coding styles) express this as<div class=”header”>, <div id=”header”>, <div class=”head”>, or simply <div> or just when bUIlding a header utilizing non-semantic components. 

The creation of a header element can be done in a variety of methods, each according to the developer's preferences. It makes code simpler for everyone to comprehend by developing and adhering to a common semantic element. 

A few additional "semantic" components have been introduced to HTML5, an improved version of HTML4. Some of us might still be perplexed as to why so many various components don't appear to have undergone significant alterations. 

Example <section>&<article> 

What is the difference, one may wonder? These two components, which are both utilized for content sectioning, are unquestionably interchangeable. 

In essence, it depends on whatever circumstance. While HTML4 only supplied the <div> container element, HTML5 gave us the <section> and <article> container elements to replace <div>. Although HTML5 still makes use of <div> 

<Section> and <article> components are conceptually interchangeable and identical. We should keep in mind the following while choosing one of these elements: 

While a section is a topical grouping of material, an article is intended to be independently distributable or reusable. 

To locate certain items inside an array of objects, write a Javascript code snippet. 

For the same, we may utilize the Javascript "find" technique. 

UI developer interview questions and answers for experienced can be short as well as long depending on the company. 

This is a frequently asked question in UI Developer coding interview questions.

A Boolean value must be returned by the function. 

The function's code is shown below. If the string is a palindrome, the function returns true; otherwise, it returns false. 

functionisPalindrome(string) { 
  string = string.replace(/\W/g, '').toLowerCase(); 
  return (string == string.split('').reverse().join('')); 
} 

For example: 

console.log(isPalindrome("level"));                   // logs 'true' 
console.log(isPalindrome("levels"));                  // logs 'false' 

This concludes the blog post on the most common UI Developer Interview Questions. This should enable you to perform well in any forthcoming interviews. I wish you luck on the interview! 

Join the Free Online Courses given by Great Learning Academy to upskill right away if you want to learn more about these ideas. 

The instructions are reqUIre() and include(). The need () command generates a fatal error when it is unsuccessful, whereas the include () method raises a warning. 

 As its name suggests, Reset.css removes all of the bUIlt-in styles that come with browsers, including padding, margin, and border. 

On the other hand, normalize, as implied by the name. 

A uniform book-like look is established across all browsers through CSS, including bold headers, margins between paragraphs, and a consistent font. The styles are just normalized; they are not reset. 

AJAX is asynchronous JavaScript and XML in its full form. It is a JavaScript-based client-side application. 

Without having to reload the page, we may retrieve or upload data from a remote site using AJAX. 

The Bootstrap plugin library has a wide variety of plugins, as seen below. 

• Alert 
• Affix 
• Collapse 
• Dropdown 
• Popover 
• Button 
• Carousel 
• Scrollspy 
• Modal 
• Tab 
• Tooltip 

UI developer interview questions for 5 years experience are as above and below. 

This question also gives the interviewer a chance to assess your approach, but it also gives you a chance to highlight your skill in problem-solving. Guide the interviewer through the processes you would take to determine what makes websites run slowly and what you would do to improve loading times as you respond to this question. 

Example: "I would examine different aspects of your website. One thing I would do is check the website for any dead links using a link analysis tool. I would also examine the site's various pages' code. 

Linking related pages to a single CSS sheet can help with the latter issue by streamlining the coding. 

Moving the JavaScript code to the HTML document's bottom of a page is another thing I might do. This enables the page to display before the download of all JavaScript code. In addition, I would verify the website's servers. If permitted, I would switch the website's distribution to a content delivery network. By doing this, visitors may view the website from a server that is located closer to them. After all of this, I'll check the website's loading times once again. 

Negative feedback is something that all UI designers will encounter, but what you do with it is what counts. You are able to employ the STAR approach with this query. Talk about a time when you received critical comments and what you did to make it better. 

"I previously worked on a free smartphone game app that required users to tap the screen at precisely the correct moment," for example. Three out of every five clients, however, filed complaints alleging that the program was indifferent to their needs. The vast majority of them were given one or two stars. 

I investigated the code of my app and discovered that it was too huge for various phone operating systems after interacting with some users and asking them to look into whether there were any external problems, such magnets, that were causing their screens to be unresponsive on their end. I made coding changes and re-submitted the application. All of the people I spoke with agreed that the system had significantly improved. 

Another query regarding your professional background as a UI designer can follow the one about user input. You have the chance to discuss how you collaborated with a team on a bigger project at this point. Think about sharing a time when you overcame a hurdle and describe what you did to get the desired outcome. 

An accomplished author and motivational speaker's website needed to be updated, so I once worked on a four-person team to do it. The website had many broken links, most of the content was placed in tables, there was a lot of text that was colorful, and the navigation was not simple. Over 150 pages of information were improved through collaboration with a writer, a graphic designer, and an IT specialist. 

I was able to revamp each page of the website after two months, relocating the navigation from the side to the top of each page. Even a site map would have been part of my plan. The website's traffic increased by more than three times six months later. 

The website's creator was so taken with its layout that he suggested me to one of his friends because of it. 

These are the design elements: 

• LINE: The edge formed when two forms converge or the linear markings made with a pen or brush. 
• SHAPE: A shape is a discrete region of organic or geometric elements (such as squares and circles) (free formed shapes or natural shapes). A negative form always results from a positive shape. 
• DIRECTION: All lines have a direction, whether it is horizontal, vertical, or oblique. Horizontal conveys tranqUIlity, stability, and peace. The vertical position conveys a sense of harmony, formality, and awareness. Obliquely implies motion and action 
• SIZE - The connection between the area filled by one form and another is known as size. 
• TEXTURE: A shape's texture—which might be rough, smooth, soft, hard, glossy, etc.—defines its surface quality. 
• COLOR - Color is the light that an item reflects. Hue, or the color's name (red, green, blue, etc.), value, and intensity make up the three primary components of color (how bright or dull it is). 

An HTTP header called Content Security Policy (CSP) gives site owners fine-grained control over where resources on their site can be loaded from. The most effective way to guard against cross-site scripting (XSS) vulnerabilities is to use this header. CSP is required for all new websites and is highly advised for all high-risk sites that are already online due to the challenge of retrofitting CSP into existing websites. 

The main advantage of CSP is the removal of dangerous inline JavaScript. As a result of inline JavaScript, which can be reflected or saved, incorrectly escaped user inputs may result in code that the web browser interprets as JavaScript. 

You may successfully stop virtually all XSS attacks on your website by using CSP to prevent inline JavaScript. 

Here is a sample of Javascript code that uses the "filter" function: 

1. let data = [ 
2. "files/dir1/file1", 
3. "files/dir1/file2", 
4. "files/dir2/file1", 
5. "files/dir2/file2" 
6. ]; 
7. let filteredData = data.filter(path =>path.includes('dir2')); 
8. console.log(filteredData); 
9. [ 'files/dir2/file1', 'files/dir2/file2' ]

Event propagation is defined as the order in which events occur on the element. 

When the event is triggered, the element bubbles up the DOM tree, calling the child node first and then the parent node. This is referred to as event bubbling. 

Event capturing is the inverse of event bubbling in that the parent node is called first, followed by the child node. 

The distinction between local storage, session storage, and cookies is as follows: 

• Local storage has the highest possible storage capacity and enables for data storage with no expiration date. 
• Session storage associates saved data with a session. The data disappears when the user closes the tab or browser, just like in local storage. 
• Cookies are little pieces of data that are transmitted back to the server. The data stored must be less than 4KB in size. 

Because of the following advantages:

• It is simple to use and learn. 
• It is easily extensible. 
• Cross-browser compatibility (IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+) 
• Simple to use for DOM manipulation and navigation. 
• A large number of bUIlt-in techniques are available. 

AJAX Capabilities:

• Methods for altering or applying CSS, as well as producing animations. 
• Event detection and handling 
• There are several plug-ins available to meet a wide range of reqUIrements. 

PUT directs a file or resource to a certain URI. If there is already a file or resource at that URI, PUT replaces it. If there is no resource or file present, PUT creates one. 

POST delivers data to a certain URI and expects the resource at that URI to handle the request. At this point, the web server may determine what to do with the data in the context of the requested resource. 

PUT is idempotent, which means that using it any number of times has no effect on resources. 

POST, on the other hand, is not idempotent, which means that if you use it numerous times, it keeps producing new resources. 

If neither attribute is present, the script is downloaded and performed synchronously, and processing of the page is halted until it has completed execution (default behavior). Scripts are downloaded and run in the order they are encountered.

The defer attribute downloads the script while the document is still parsing but waits until the document is through parsing before running it, which is analogous to executing within a DOMContentLoaded event listener. Deferred scripts will run sequentially.

The async property downloads the script while processing the page, but it pauses the parser to run the script before it has finished parsing. Async scripts will not always execute in the same sequence.

Both attributes must be used only if the script contains a src attribute (i.e. not an inline script).

<script src="myscript.js"></script> 
<script src="myscript.js" defer></script> 
<script src="myscript.js" async></script>