20 Web Development Interview Questions

Web Development Interviews
Web Development Interviews

Now that most of you have studied web development or are still exploring the many realms of it; let us do a quick recap on what is Web Development. It is basically the study of developing a website for the internet or intranet. The development can vary from a single static page of plain text to complex web-based internet applications, electronic businesses, and social network services.

If you are good at web development, then there are various companies offering jobs for different roles like Web Developer, UI/Web Designer and many more. However, you need to undergo the interview to secure a job opportunity. 

Below are a few questions that can help you get through the grilling rounds during a web development job interview. 

  1. What are the major responsibilities given to a web developer?
    Most of the time, the entire project is shouldered by a web developer. Some of the key responsibilities are:  

    – Creating an appropriate structure for the project
    – Assist in the maintenance of the website
    – Have the ownership of code throughout the process
    – Coordinate with the designers
  1. What is Test-Driven development?
    Test-Driven Development (TDD) is called Test-Driven Design. In TDD, a developer first writes an automated test case and then generates small codes to pass that test. Then, he refactors the new code to meet the acceptable standards. 
  1. Explain the term DOCTYPE.
    Document type declaration often referred to as DOCTYPE is used to convey to the browser the type of HTML to use on a web page. In return, the browser uses it to see a page that must be rendered. If DOCTYPE is missing, it may load the page in incorrect mode.
  1. How would you optimise the website’s assets?
    The website’s assets can be done using the file concentration, file compression, CDN Hosting, offloading assets, or re-organising and refining code and more.
  1. What is a responsive website?
    A website is called responsive when it appears good and fits all kinds of screen resolution device types. Cascading Style Sheets (CSS) media queries are used to re-arrange. Display, or hide the elements.
  2. When do you use mysql_pconnect? 
    Mysql_pconnect is used to close the database connection after the request has been successfully processed.  
  3. Differentiate between SOAP and REST.
    Simple Object Access Protocol (SOAP) and is a protocol, whereas Representational State Transfer (REST) stands for an architectural pattern. The key reason to design SOAP is to ensure that programs built on different platforms and programming languages could exchange data in an easy manner. On the other hand, REST is designed to work with components such as media components, files and objects on a particular hardware device.
  1. Why are you drawn to web development?
    This question is a tricky one and there are two approaches to answer it. One is to address it with certainty saying that it is dynamic and evolving and enables the developer to practise on new tools. Whereas, the second option is to explain to them the industry demand and how it is overhauling the web applications with native mobile applications. 
  2. What should a web developer know?
    A good developer must know about  the following: 
    – HTML
    – CSS
    – SQL
    – PHP/Ruby/Python
    – JQuery
    – JavaScript
  1. Differentiate between HTML and HTML5.
    The latest version of HTML is HTML5. The key difference between the two is that HTML does not have audio and video features. However, HTML5 has features such as audio, video, date select function, canvas, placeholder, graphics and local SQL database that do not ask for external plugin.
  2. What is CORS?
    The full form of CORS is Cross-Origin Resource Sharing. It is a mechanism used to enable the sources on a webpage to get permitted from another domain. It is supported in HTML5.
  3. What are the different types of triggers in MySQL?
    The different types of triggers are:
    – Before Insert
    – After Insert
    – Before Update
    – After Update
    – Before Delete
    – After Delete
  4. How would you reduce the load time of a website?
    To reduce the load time, we can:
    – Optimise images to no longer than the screen resolution
    – Eliminate all JavaScript files 
    – Combine & Minify all CSS and JS 
    – Defer or Async JS files
  5. What is semantic HTML?
    Semantic HTML basically describes the meaning to both browser and developer used to refer to a coding style where the tags indicate the semantics of text that is to be conveyed. It only represents formatting without any structure or meaning. 
  6. What is web accessibility?
    Web accessibility is a format to make web technology, tools and the website accessible for differently-abled individuals and in regions undergoing socio-economic distress. The newest version-HTML5 language has WAI-ARIA for the differently-abled people who can use navigate, understand and interact with it. 
  7. What are the different types of pop-up in JavaScript?
    The different types of popup in JavaScript are:
    – Alert ()
    – Confirm ()
    – Prompt ()
  8. What is DOM and how it is related to CSS?
    DOM stands for Document Object Model and is a cross-platform and language-independent application programming interface. DOM treats an HTML, XHTML, or XML document as a tree structure and each node are seen as an object. The web browser converts HTML and CSS into DOM.
  9. Differentiate between Cookies, sessionStorage and localStorage.
    Cookies are just small text files for tracking or login purposes. localStorage and sessionStorage are new objects and storage specifications. But, localStorage is permanent and website-specific. And, the other one only lasts as long as the duration of the longest open tab. 
  1. Do you have any idea about Jasmine or QUnit?
    Jasmine is a Behaviour Driven Development Testing framework. However, QUnit is a JavaScript unit testing framework. These are both open-source tools however, Jasmine is most preferred for websites and Node.js projects and QUnit for mobile projects and testing any generic JavaScript code including itself. 
  2. How do we insert a copyright symbol on a browser page?
    To insert the copyright symbol on a browser page, we need to type © or & #169 in an HTML file.

We believe that being knowledgeable is not the only aspect to look at while appearing for the interview. But, you must be confident about your web development skills while appearing in an interview. We hope this guide helps you in your job hunt as a web developer and gives you a fair idea about the type of questions to expect. 

Happy Job Hunting!