Published on November 25, 2025 by
The high demand for is being driven by the rising popularity of e-commerce platforms and mobile-based applications, according to the Bureau of Labor Statistics.
Web developers, with a deep understanding of popular technologies, such as Jav, are the most sought after professionals in the IT industry today. However, to get a dream job, you will first have to prepare yourself for tough interviews.
In this article, we are going to list the most commonly-asked web development interview questions you are likely to encounter. We have divided the questions into two parts: for beginners and for experienced web developers. Taking a quick look at these web developer interview questions and answers will give you a boost of confidence when you appear in any web development interview, no matter at which stage you are in your career.
If you’re a beginner looking to start your career in web development, you are expected to be aware of certain basics, not only pertaining to the concepts but also to the field as a whole. Here are some of the frequently-asked junior web developer interview questions. Knowing the answers to these will offer a good grasp of basics that you can leverage in interviews for web developer positions.
Web development professionals should have the following key skills:
The primary responsibilities of a web developer include:
HTTP/2 has a number of notable advantages over HTTP 1.1, which are:
The following actions should be performed to improve page loading speed:
XHTML differs from HTML in many ways, for example:
When given dependencies-containing modules, Webpack creates static assets to represent those modules.
JavaScript module bundler Webpack is free and open-source. Although it is designed primarily for JavaScript, it may also modify front-end assets like HTML, CSS, and pictures if the appropriate loaders are also present. Using modules with dependencies,
Implementing various Java script files without worrying about which would load first is beneficial. It results in shorter code. In addition to java script, it assists in turning many other files into modules. It assembles many Java script modules.
Input types, including Date, Date Time-local, time, week, month, email, tel, URL, search, range, color, and number, are among the new ones introduced by HTML5. to enhance user interaction and make forms more engaging. However, a browser will interpret these new input types like a standard text box if it is unable to recognize them.
The web page, a hypertext document created by a website and presented to a user via a web browser, uses HTML elements to format and provide semantics to various sections of the content. The general HTML components div> and span> are both used to identify two different sections of a website. These tags are used for both structuring and styling. Here, we’ve examined the distinctions between the HTML tags for div and span.
To stylize text, use the generic inline element span>. A part of the inline content is given style. The inline element merely takes up as much room as the text and does not require a new line. These tags can be used for brief passages of text, images, links, and other HTML components that may be displayed inline with other content.
Web Storage in HTML Web storage allows web applications to store data locally in the user’s browser. Application data had to be preserved in cookies and sent with each server request before HTML5. Web storage, which is more secure, allows for the local storing of large amounts of data without impairing a website’s operation.
9 monthsView Program
7 monthsView Program
Jonathan MabialaJava Software Developer, DesjardinsI chose to upskill after moving from the United States to Canada in 2019. My journey in programming began during engineering, but I lost touch after college. Realizing I needed certification to advance, I enrolled in Simplilearn. The live classes boosted my confidence, allowing me to transition to a Java Software Developer role.
Atharv ChavanSoftware Development Engineer, PTCUpskilling with Java Development course transformed my career. The hands-on coding sessions and expert mentorship bridged the gap between theory and real-world application. With enhanced skills, I secured a new job, delivered projects ahead of schedule, and even earned an innovation award—marking a significant milestone in my IT journey.Not sure what you’re looking for?View all Related Programs
The DOM enables programmatic reading, manipulation, and modification of an XML document. The XMLReader class also reads XML, but it does so in a non-cached, forward-only, read-only manner.
Pair software programming is a sequential model in which two programmers collaborate on the same computer. While the driver is writing code, the observer or navigator reviews each line of programming as it is entered. Positions for software developers frequently change.
The ability to balance and comprehend these disparate factors is essential for any web developer. In addition, their response will indicate which factors they will prioritize when coding.
If you work for an online publication, performance and SEO will be more important. While the driver is writing code, the observer or navigator reviews each line of programming as it is entered. Positions for software developers frequently change.
SVG is an XML-based language for describing 2D graphics. Canvas generates 2D graphics in real-time (with JavaScript). Because SVG is based on XML, every element is accessible through the SVG DOM. JavaScript event handlers can be attached to an element.
The automatic or implicit conversion of values between different data types is known as type coercion (such as strings to numbers).
Both explicit and implicit type coercion is possible. Explicit type coercion occurs when developers explicitly state their goal to convert between types by writing the necessary code, such as Number(value) (or type casting).
The window.onload method is called after the entire web page has been loaded. This includes all memory-based and model elements such as the head tag, headline, and all other tags such as template files, images, and videos. The onload method is called by passing it a function. After the object has been loaded, the called function would be executed.
The most common HTTP request methods are as follows:
POST, GET, PUT, PATCH, and DELETE are the five main or most often used HTTP verbs (or methods, as they are officially known). These stand for the CRUD (create, read, update, delete) operations, in that order. Other verbs exist as well, albeit they are used less frequently.
If you’ve had some experience as a web developer and are interviewing for senior web developer positions, then you are likely to come across some of these frequently-asked senior web developer interview questions.
An HTML5-supported mechanism, Cross-Origin Resource Sharing, or CORS, enables the requesting of resources on web pages from other domains outside the domains from where the resources originated.
An Entity Tag, or ETag, is an integral element of HTTP (Hypertext Transfer Protocol): the protocol that facilitates communication between servers and web browsers. Entity Tag is one of the many mechanisms that the Hypertext Transfer Protocol provides for cache validation, allowing conditional requests from a client.
Long polling is a method to maintain a persistent connection to the server. Long polling keeps the client’s connection intact and open till the server can transmit data to any client. The connection closes only after data is returned to a client, or when a connection timeout happens.
DTD is short for Document Type Definition. It defines attributes, structure, and legal elements of XML documents.
PCDATA, or Parsed Character Data in the DTD, is the text that the XML parser will parse. Tags within the text are processed as markup, and the entities are expanded.
CDATA, or Character Data in the DTD, is the text that the XML parser will not parse. Tags within the text are not processed as markup, and the entities are not expanded.
HTML5 incorporates a variety of APIs, such as:
To style a single HTML element on the page, use Inline CSS in the style property. By incorporating CSS into the head portion of our HTML text, we may embed an internal stylesheet. In order to keep our CSS and HTML separate, we can also connect to an external stylesheet.
6 Simple Methods for Boosting Page Loading Speed
The word NPM (Node Package Manager) tends to come from when npm was first created as a package manager for Node.js. All npm packages are defined in package.json files.
Relevant Read: Everything You Need To Know About Express JS NPM 🎯
Popup boxes are used in Javascript to display a message or notification to the user. In JavaScript, pop-up boxes are classified into three types:
The JavaScript variable accessibility is based on the current context of the code, which is referred to as scope.
The two scope kinds are local and global. Variables that are declared outside of a block are referred to as global variables. Local variables are those that are declared within a block.
CDNs cache content such as web pages, images, and videos in proxy servers located near your physical location.
You may check your bank balance, download software, watch a movie, post on social media, or make purchases without waiting for the content to load.
A global organization made up of member organizations is the World Wide Web Consortium (W3C), a full-time staff, and the general public that collaborates to develop Web standards.
The first component of a CSS Rule is a CSS selector. It is a pattern of elements and other terms that tells the browser which HTML elements should be selected in order for the CSS property values contained within the rule to be applied to them.
CSS Element Selector, CSS Id Selector, CSS Class Selector, CSS Universal Selector, and CSS Group Selector are some examples of CSS selectors.
9 monthsView Program
7 monthsView Program
Jonathan MabialaJava Software Developer, DesjardinsI chose to upskill after moving from the United States to Canada in 2019. My journey in programming began during engineering, but I lost touch after college. Realizing I needed certification to advance, I enrolled in Simplilearn. The live classes boosted my confidence, allowing me to transition to a Java Software Developer role.Atharv ChavanSoftware Development Engineer, PTCUpskilling with Java Development course transformed my career. The hands-on coding sessions and expert mentorship bridged the gap between theory and real-world application. With enhanced skills, I secured a new job, delivered projects ahead of schedule, and even earned an innovation award—marking a significant milestone in my IT journey.Not sure what you’re looking for?View all Related Programs
A selector’s term that indicates the special state of the selected element is called a pseudo-class in CSS.
For example, when a user’s pointer hovers over a button, the pseudo-class:hover can be used to select it, and the selected button can then be styled.
You can use media queries to apply CSS styles based on the general type of a device, such as print.
Media queries serve the following purposes: CSS @media and @import at-rules can be used to conditionally apply styles.