Web Developer Interview Questions and Answers, Web Developer Interview Questions and Answers Freshers, Web Developer Interview Questions and Answers, Web Developer Interview Questions

Before getting on to the Web Developer interview questions, the student must know that the Web Developer is a continuously varying field which needs the students as well as professionals to upgrade their skills with the new features and knowledge, to get fit for the jobs associated with Web Developer. This post related to Web Developer Interview Questions and Answers, Web Developer Interview Questions and Answers Freshers, Web Developer Interview Questions and Answers, Web Developer Interview Questions will help you let out find all the solutions that are frequently asked in you upcoming Web Developer interview.

Over thousands of vacancies available for the Web Developer developers, experts must be acquaintance with all the component of Web Developer technologies. This is necessary for the students in order to have in-depth knowledge of the subject so that they can have best employment opportunities in the future. Knowing every little detail about Web Developer is the best approach to solve the problems linked with problem.

APTRON has spent hours and hours in researching about the Web Developer Interview Questions and Answers, Web Developer Interview Questions and Answers Freshers, Web Developer Interview Questions and Answers, Web Developer Interview Questions that you might encounter in your upcoming interview.  All these questions will alone help you to crack the interview and make you the best among all your competitors.

First of all, let us tell you about how the Web Developer technology is evolving in today’s world and how demanding it is in the upcoming years. In fact, according to one study, most of the companies and businesses have moved to the Web Developer. Now, you cannot predict how huge the future is going to be for the people experienced in the related technologies.

Hence, if you are looking for boosting up your profile and securing your future, Web Developer will help you in reaching the zenith of your career. Apart from this, you would also have a lot of opportunities as a fresher.

These questions alone are omnipotent. Read and re-read the questions and their solutions to get accustomed to what you will be asked in the interview. These Web Developer interview questions and answers will also help you on your way to mastering the skills and will take you to the giant world where worldwide and local businesses, huge or medium, are picking up the best and quality Web Developer professionals.

This ultimate list of best Web Developer interview questions will ride you through the quick knowledge of the subject and topics like PHP Framework, HTML server controls, Label, Binding to drop down lists. This Web Developer interview questions and answers can be your next gateway to your next job as a Web Developer expert.

These are very Basic Web Developer Interview Questions and Answers for freshers and experienced both.

Q1: Explain what are the key responsibilities of a Web Developer?
A1:

  • Program test and debug all web applications
  • Design, develop, test and deploy web applications
  • Uploading sites onto server and registering it with different search engines
  • Coordinate with other designers and programmers to develop web projects
  • Fix bugs, troubleshoot and resolve problems
  • In case of system failure initiate periodic testing and implement contingency plans
  • Develop appropriate code structures to solve specific tasks
  • Support and assist in the upkeep and maintenance of websites
  • Assume ownership of code throughout staging, development, testing and production

Q2: What web developer should know?
A2: A good web developer should know

  • HTML
  • CSS
  • SQL
  • PHP/Ruby/Python
  • JQuery
  • JavaScript

Q3: Explain what is CORS? How does it work?
A3: (CORS) Cross-Origin Resource Sharing is a mechanism that enables many resources (e.g., JavaScript, fonts etc.) on a web page to be requested from another domain outside the domain from which the resource originated.  It is a mechanism supported in HTML5 that manages XMLHttpRequest access to a domain different.

Q4: List out the advantage of HTTP/2 as compared with HTTP 1.1?
A4: The advantage of HTTP/2 compared to HTTP/1.1 is

  • HTTP headers data compression
  • Server push technologies
  • Over a single TCP connection parallel loading of page elements
  • Prioritization of request

Q5: Explain what is an ETag and how does it work?
A5: An ETag is an opaque identifier allocated by a web server to a specific version of a resource found at a URL.  The ETag is a part of HTTP, the protocol for the world wide web and when the server reads the ETag from client request, the server can then tell whether to send the file (HTTP 200) or tell the client just to use their local copy (HTTP 304).

Q6: In HTML mention the difference between <div> and <frame>?
A6: The difference between <div> and <frame> is that a <div>

Frame Div
With frames, you can show more than one HTML document in the same browser window The <div> tag defines a division or a section in an HTML document
The frame tag declares one particular window within a frameset The <div> is used to group block-elements to format them with styles
Frames can load other resources using HTML On the other hand page, divisions can serve local content in the manner of the frames, but that content is not independent of the page though

Q7: How XHTML is different from HTML?
A7:

  • XHTML requires that all tags should be in lowercase
  • XHTML requires that all tags should be closed properly
  • XHTML requires that all attributes are enclosed in double quotes
  • XHTML forbids inline elements from containing block level elements

Q8: List out the new APIs provided by HTML 5 standard?
A8: HTML 5 comes with number of new APIs

  • Media API
  • Text track API
  • Application Cache API
  • Data transfer API
  • User Interaction
  • Command API
  • Constraint Validation API
  • History API

Q9: What Are The New Form Elements Introduced In HTML5?
A9: Here is the list of new form elements available in HTML5.

  • <datalist> –It specifies a list of options for input controls.
  • <keygen> –This tag generates an encryption key.
  • <output> –It defines the result of an expression.

Q10: What Are The Various Elements HTML5 Has Added For Media Content?
A10: Following HTML5 elements supports media content.

  • <audio> –It specifies sound content.
  • <video> –It links to a video.
  • <source> –This tag specified the source of video and audio links.
  • <embed> –It acts as a container for external applications.
  • <track> –This element defines tracks for video and audio.

Q11: How Does CSS3 Differ From CSS?
A11: CSS3 is the most recent version of CSS. It has introduced a bunch of new tags to give better user experience. Some of the features are rounded corners, animation, custom layout and media queries.

Q12: How Does CSS3 Support The Responsive Web Designing?
A12: CSS3 has come up with a media query feature. It supports RWD (Responsive Web Design) and does help in making a website responsive.

Q13: What Is A CSS Selector?
A13: CSS selector is an expression following the CSS rules and used to select the element we want to style. And CSS selector syntax means how we write or use those selectors in the CSS editor.

Please note that a CSS selector can help you find or select HTML elements based on their name, id, class, attribute, and more.

Q14: What Are Child Selectors In CSS?
A14: A child selector looks up for the child of some element. To form a child selector, we need two or more selectors separated by “greater than” symbol.

Let’s take an example. We have a <ul> tag inside a paragraph. Here, <ul> is the child of the paragraph element. So, to apply the CSS styles, we can use the following syntax.

p > ul { font-size:15px; }

Q15: an you describe your workflow when you create a web page or web app?
A15: This is a good way to assess how your candidate approaches a basic chunk of work. Do they use snippets to quickly layout a basic HTML page, add a little jQuery and start coding? Or do they use a more in-depth approach such as Bower or Yeoman?

Q16: What tools do you use to find a performance bug?
A16: This will depend on your candidate’s development environment as different programming languages use different profilers and some frameworks have built-in debug tools to find performance issues. This doesn’t matter too much, but their approach does.

Q17: How do you organize your JavaScript code?
A17: This questions will give you an insight into how your candidate organizes their code. Do they separate JavaScript and HTML? Is the JS broken into logical units and kept in separate files? Do they use a script to concatenate these files into a single bundle? Do they use JS namespaces to avoid cluttering up the global namespace?

Q18: How do you take into account SEO, maintainability, UX, performance, and security when you’re building a web application?
A18: This is a biggie. The ability to balance and understand these very different factors is a core competency for any web developer. Their response will also indicate which factors they will prioritize when coding. For example, if you are a large financial institution, you may favor security over SEO. If you are an online publication, performance and SEO will be more important for your type of work.

Q19: How are you keeping up with the latest developments in web development?
A19: In other words, this will determine if your candidate continues to learn programming and makes the effort to stay on top of his skills. You can ask your candidate about their favorite programming-related Twitter accounts and why they like it, for example. If your candidate doesn’t use Twitter, ask which tech publications they read and authors or personalities in the dev world they admire and why.

Web development is always changing, so being curious about the latest trends and forming opinions about them is typicially a good sign.

Q20: Explain how you optimize and reduce web application load time.
A20: Almost half of all users want a web page to load within two seconds. Ask this question to learn if a candidate is aware of the impact that page load time has on the user experience, and how a web developer should analyze data and track improvements to optimize load time.

What to look for in an answer:

  • How much importance they place in optimizing web applications
  • Understanding of tools they can use to analyze website speed
  • Evidence they have successfully reduced load time

Example: “Although there are numerous techniques a web developer can use in reducing load time, I always rely on optimizing images, enabling browser caching and minimizing HTTP requests. My go-to tool for evaluating site speed is Google PageSpeed Insights. In one instance, I successfully reduced page load time from 2.1 seconds to .7 seconds by soley enabling browser caching.”

Almost half of all users want a web page to load within two seconds. Ask this question to learn if a candidate is aware of the impact that page load time has on the user experience, and how a web developer should analyze data and track improvements to optimize load time.

Q21: What to look for in an answer:
A21:

  • How much importance they place in optimizing web applications
  • Understanding of tools they can use to analyze website speed
  • Evidence they have successfully reduced load time

Example: “Although there are numerous techniques a web developer can use in reducing load time, I always rely on optimizing images, enabling browser caching and minimizing HTTP requests. My go-to tool for evaluating site speed is Google PageSpeed Insights. In one instance, I successfully reduced page load time from 2.1 seconds to .7 seconds by soley enabling browser caching.”

Q22: What are the differences of using HTTP/2 as opposed to HTTP 1.1?
A22: Knowing if a candidate understands the main differences and advantages to using HTTP/2 will reveal their level of understanding, cluing you in to how their methods will align with the web developer role.

Q23: What to look for in an answer:
A23:

  • Overall HTTP knowledge
  • Ability to recall specific information
  • Insight into their approach

Example: “HTTP/2 was designed to improve web application performance. A web developer can appreciate how it makes applications simpler and faster by reducing load times and improving communication between browsers and servers. I’m a strong advocate for using HTTP/2, as I’ve analyzed data and seen how HTTP/2 can decrease page load time by up to 20%.”

Q24: What are some new HTML5 markup elements?
A24: Among several: <article>, <aside>, <bdi>, <command>, <details>, <figure>, <figcaption>, <summary>, <header>, <footer>, <hgroup>, <mark>, <meter>, <nav>, <progress>, <ruby>, <rt>, <section> and <time>.

Q25: What are the new image elements in HTML5?
A25: The new image elements in HTML5 are Canvas and WebGL. <canvas> is a new element that acts as a container for graphical elements like images and graphics. WebGL stands for Web Graphics Language, a free cross-platform API that is used for creating 3D graphics in web browsers.

Q26: What are data- attributes good for?
A26: data- attribute is used to assigns custom data to an element. The stored (custom) data can then be used in the page’s JavaScript to create a more engaging user experience.

Q27: Describe the difference between cookies, sessionStorage, and localStorage.
A27: Cookies are small text files that websites place in a browser for tracking or login purposes, and hold a modest amount of data.

Meanwhile, localStorage and sessionStorage are new objects, both of which are storage specifications but vary in scope and duration. Local storage is more secure, and large amounts of data can be stored locally, without affecting website performance. Futhermore, is it permanent. sessionStorage only lasts as long as the duration of the longest open tab.

Q28: What is the difference between visibility:hidden and display:none?
A28: Although these two properties seem similar, there is quite an important difference between the two:

  • visibility:hiddenhides the element, but it will still takes up space, this way affecting the layout of the document.
  • display:nonealso hides the element, but will not take up space and the page will appear as if the element is not present.

Q29: What are CSS preprocessors and why do we use them?
A29: CSS preprocessors convert code written in a preprocessed language like SASS or LESS into the same old CSS we’ve been using for such a long time now. The main advantages of using preprocessors are:

  • Ability to define variables
  • Ability to use nested syntax
  • Ability to create and use mixins (functions)
  • Use of mathematical and operational functions

However, there are also some disadvantages like updating issues and debugging difficulties.

Q30: Explain what pseudo-classes are and their usage.
A30: Pseudo clasess are used to define a special state of an element. Do note that pseudo classes are not defined in the markup. They can be used for:

  • Styling an element on mouse over (hover)
  • Styling an element when it gets focus
  • Styling visited/unvisited links

 

Q31: What is the difference between window.onload and onDocumentReady?
A31: The window.onload event will not trigger until every single element on the page has been fully loaded, including CSS, images and/or other assets. The main disadvantage is that it might take a while before any code is actually executed. On the other hand, onDocumentReady executes code as soon as DOM is loaded.

Q32: Which is faster between Javascript and ASP?
A32: Javascript is obviously faster. Why? Because Javascript is a client-side language and execution does not need assistance from the web server. In contrast, ASP is server-side therefore is slower.

Q33: What is an anonymous function is Javascript
A33: An anonymous function is a function declared without any named identifier and in general, is not accessible after its declaration.

Knowing if a candidate understands the main differences and advantages to using HTTP/2 will reveal their level of understanding, cluing you in to how their methods will align with the web developer role.

What to look for in an answer:

  • Overall HTTP knowledge
  • Ability to recall specific information
  • Insight into their approach

Example: “HTTP/2 was designed to improve web application performance. A web developer can appreciate how it makes applications simpler and faster by reducing load times and improving communication between browsers and servers. I’m a strong advocate for using HTTP/2, as I’ve analyzed data and seen how HTTP/2 can decrease page load time by up to 20%.”

Web Developer Conclusion Interview FAQs

We know the list of Web Developer Interview Questions and Answers, Web Developer Interview Questions and Answers Freshers, Web Developer Interview Questions and Answers, Web Developer Interview Questions is overwhelming but the advantages of reading all the questions will maximize your potential and help you crack the interview. The surprising fact is that this Web Developer interview questions and answers post covers all the basic of the Web Developer technology and you have to check out the FAQs of different components of Web Developer too.

However, you will be asked with the questions in the interview related to the above mentioned questions. Preparing and understanding all the concept of Web Developer technology will help you strengthen the other little information around the topic.

After preparing these interview questions, we recommend you to go for a mock interview before facing the real one. You can take the help of your friend or a Web Developer expert to find the loop holes in your skills and knowledge. Moreover, this will also allow you in practicing and improving the communication skill which plays a vital role in getting placed and grabbing high salaries.

Remember, in the interview, the company or the business or you can say the examiner often checks your basic knowledge of the subject. If your basics is covered and strengthened, you can have the job of your dream. The industry experts understand that if the foundation of the student is already made up, it is easy for the company to educate the employ towards advance skills. If there are no basics, there is no meaning of having learnt the subject.

Therefore, it’s never too late to edge all the basics of any technology. If you think that you’ve not acquired the enough skills, you can join our upcoming batch of Web Developer Training in Noida. We are one of the best institute for Web Developer in noida which provide advance learning in the field of Web Developer Course. We’ve highly qualified professionals working with us and promise top quality education to the students.

We hope that you enjoyed reading Web Developer Interview Questions and Answers, Web Developer Interview Questions and Answers Freshers, Web Developer Interview Questions and Answers, Web Developer Interview Questions and all the FAQs associated with the interview. Do not forget to revise all the Web Developer interview questions and answers before going for the Web Developer interview. In addition to this, if you’ve any doubt or query associated with Web Developer, you can contact us anytime. We will be happy to help you out at our earliest convenience. At last, we wish you all the best for your upcoming interview on Web Developer Technology.

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