Web Designer Interview Questions and Answers for 2024
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| Web Designer Interview Questions and Answers for 2024 ( Advanced Part ) |
1.
What are the types of pop-up
boxes present in JavaScript?
This question is a regular feature in
responsive web design interview questions, be ready to tackle it. In
JavaScript, you may use three distinct sorts of pop-up windows: Alert Boxes,
Confirm Boxes, and Prompt Boxes. Any message or notice is shown to the user in
a pop-up window, which can be of three types:
- Whenever an alert has to be generated, the “Alert Box” is what you
want to utilize. So when a user is prompted with the alert box, they
should choose "OK" to continue.
- To get the user's consent or approval, a "Confirm Box"
will come up. To continue, the user must choose either ok or cancel.
- Pop-up boxes like the "Prompt Box" are used to solicit
information from the user. If the user presses cancel after inputting the
necessary information, however, the null result is returned.
2.
Mention the difference between
<window.onload> and <onDocumentReady>.
The only
difference between these events is their time of execution. An advanced web
designer must have knowledge of it. That’s why we consider it to be one of the
most important senior web designer interview questions.
The <window.onload> event gets executed only when all of a page's CSS and
image styles are fully loaded. There is a little lag in page rendering because
of the event. The DOM initialization is the sole prerequisite for the
<onDocumentReady> event to take effect. It ensures zero delays in action.
3.
How is type conversion handled
in JavaScript?
The term
"type conversion" refers to the process of changing one data type
into another. When a scripting language like JavaScript or a compiled language
like C++ automatically transforms data types, this is called an implicit type
conversion. In order for a function or operator to get the desired results, it
may be necessary to perform a type conversion, like converting a string to a
number or an object to a boolean, and so forth.
4.
What is scope of a variable in
JavaScript?
The term "scope of
variables" describes how widely a given variable may be used in
the code.
Let us say that you perform two
distinct roles. In function 1, you define a variable. Then you go to the
subsequent function, which is function 2. Now, you can use the variable created
in Function 1 in Function 2. A JavaScript variable's scope is the area of code
in which it can be used.
The scopes of JavaScript variables
are as follows:
Global Scope: A variable with global scope is one that has been
defined outside of a function.
Example:
var globalVariable = "This is a Global variable"; // Code present here can use globalVariable function myFunction() { // Code present here can also use globalVariable }
Local Scope: A variable with the local scope is one that has been
declared inside a function.
Example:
// Code present here cannot use localVariable function myFunction() { var localVariable = "This is a local variable"; // Code present here can use localVariable }
Block Scope: The "block scope" variables defined inside a
certain block (denoted by {}) are inaccessible from outside of that
block.
Function Scope: When you write a function in JavaScript, you
are really establishing a new scope.
5.
How are comments used in
JavaScript?
JavaScript comments are used to
provide context and improve the readability of JavaScript code. To avoid
executing potentially problematic code while experimenting with alternatives,
JavaScript comments can be used. Code comments can be added in two different
ways in JavaScript; that are single-line and multi-line comments.
Single-line comment: “//” - it is
used to insert single-line comments.
Example:
//This is a single-line comment Multi-line comment: “/* */” is used for adding multi-line comments.
Example:
/* This is a multi-line comment*/
6.
What are undefined and
undeclared variables in JavaScript?
Undefined: Whenever a
variable is defined but not given a value, this situation arises.
'Undefined' is not a valid keyword.
Example:
var stay; undefined console.log(stay)
Undeclared: It happens when we attempt to use a variable that hasn't been
defined using the var or const keywords or hasn't been initialized.
Example:
//ReferenceError: myVariable is not defined console.log(myVariable)
7.
How to submit a form in
JavaScript?
A must-know for anyone heading into a
web design interview, this question is frequently asked in web design Interview
Questions. The following script can help you submit a form in JavaScript after
furnishing all the elements like the anchor tag and one click.
Script:
document.forms[0].submit()
[The value ‘0’ defines the index of
the JavaScript form.]
8.
Why is the <this> keyword
used a lot in JavaScript?
The
<this> keyword in JavaScript indicates the current object in use. The
method of execution determines which entity is accessed (called or used).
Depending on the usage, the <this> keyword may designate a variety of
elements. But inside an object method, <this> denotes the object.
9.
What is the use of the
<defer> attribute in JavaScript?
This is
another important senior web designer interview question. There is a boolean
element called defer. Setting this delay attribute means the script will be
downloaded in parallel with page processing but will not be run until after
page parsing is complete. That means its primary function is to postpone
running the page's JavaScript until the parser has finished loading and
initializing the page.
10. How to prioritize SEO, maintainability, performance, and security
on a website?
This is a
commonly asked technical interview question for UI/UX designers. Any competent
site designer must be able to weigh and comprehend these dissimilar aspects-
what the designers say about the aspects they consider most important while
designing. If you are designing a site for a huge financial institution, for
instance, you may prioritize safety above search engine optimization (SEO). In
contrast, online publications have a heightened focus on speed and SEO.
11. What happens if a jQuery Event Handler returns false?
If a jQuery
event handler produces a false boolean value, the event will not proceed with
its corresponding function, and the handler will be removed from future
execution.
12. What are the new features introduced in CSS3?
The goal of CSS3, the current version
of the Cascading Style Sheets language, is to expand on the capabilities of
CSS2. It introduces several improvements and modifications, including the
flexible box, multi-column, and grid layouts, as well as transitions,
gradients, shadows, rounded corners, and animations. Previously, creative HTML
hacks and applications like Photoshop were required to achieve the same level
of visual flair as is now possible directly inside a web browser using
CSS3.
What makes CSS3 so special is how
well it handles, reducing the need for images and code that used to be integral
parts of your site's structure. This means less work for your web server and
quicker page loads. One of the common topics of discussion in web design
interviews is a list of the most important new features included in CSS3. Have
a look-
- Superior animation.
- Layouts with many columns.
- Various Gradient and Background Options.
- Opacity.
- Selectors.
- Rounded corner.
13. What is Pair Programming?
In this
Agile software design method, pair programming, two designers work together on
a single computer. This practice has its roots in the Extreme programming (XP)
methodology. Two individuals collaborate on the design, development, and
testing of user stories. This method is widely used in a fast-paced work
environment. That is why pair programming is an important segment in our web
designer interview questions and answers set for experienced designers.
14. What is the use of the $() function in jQuery?
Wrapping
objects in their jQuery equivalents is done using the $() function. This is
performed so that users can access all of the jQuery object's methods. We must
also know that selectors may also be provided to the $() method, which will
return a jQuery object containing the relevant DOM components.
15. What are the benefits of using a Content Delivery Network (CDN) in
jQuery?
The term "Content Delivery
Network" (CDN) refers to a global network of servers that stores data in a
centralized location for later retrieval. With a content delivery network
(CDN), files may be sent at a greater speed from a server that is geographically
closer to the client than your web server could be, thereby cutting down on the
time it takes for the page to load.
Because of the many benefits they
provide, CDNs are commonly employed in jQuery. Here are the benefits:
- Using a CDN significantly lessens the pressure on the hosting
machine.
- Optimizations have made jQuery frameworks more quickly
accessible.
- Significant bandwidth reductions can be achieved by using
CDN.
- To further aid with speedy page loads, CDNs may store copies of
frequently visited pages in a cache.
16. What types of CDNs are supported in jQuery?
There are
two distinct types of jQuery content delivery networks (CDN): pull-style and
reverse proxy. Even though the jQuery UI CDN stores a replica of the website's
content, including media, requests are still sent to the web server in a
conventional pull. Alternatively, a reverse proxy will take quick action upon
receiving a request.
17. Explain how you can set an image as a background on web pages.
The following snippet demonstrates
how to use the body background attribute to provide the image that will be
used as the backdrop of a web page.
</head>tag. <body background= "picture.gif">
The background picture can be fixed
so that it remains constant while scrolling the browser. This may be done by
including the 'bgproperties' element in your HTML code.
<body background = "picture.gif"bgproperties="fixed">
18. Explain what Dreamweaver Template is.
Web
designers can use Dreamweaver templates to separate editable and uneditable
sections of a website. All web pages that make use of this template will
automatically reflect the changes made on it. When using Dreamweaver templates,
you can ensure that every page of your site has the same feel and design. We
may make changes to all of our site's pages at once with it.
19. When should you use these HTML5 tags- STRONG, EM, SMALL?
Although these tags may be used to
change the appearance of the text (using EM to make it italic, STRONG to make
it bold, and SMALL to make it smaller), that is not their major function, and
you shouldn't use them only to make your writing seem a certain way. These tags
provide a distinctive design impact not found in others (<b>). Here are
the functions of these tags:
- <em> tag: For marking up any emphasized text.
- <strong> tag: Mostly used in headings, titles, as well as paragraphs
to put stress over the word of greatest importance.
- <small> tag: It is commonly used for side comments, disclaimers,
clarifications, etc.
20. Explain doctype.
Commonly the first line of code in an
HTML or XHTML page is known as the DOCTYPE declaration that specifies the
document type for the file. It's not a tag or component but rather a mechanism
for telling browsers what edition of HTML or another markup language has been
used to create the current page. Each HTML file needs a declaration of its
document type to work properly.
Example:
< !DOCTYPE html > Example <!DOCTYPE html> <html> <body> <h1>This is a Heading</h1> <h2>This is HTML5 Doctype</h2> </body> </html>
