Web Development Interview Questions

October 10,2020 - 8 min read
web development interview questions

The world is going digital. Be it an organization or an individual, everyone is dependent on the world wide web to showcase their skills or augment their business on a global level. From a weekly blog to an e-commerce portal, everybody aspires to build a functional website or a web application of their own.

The market of web development has significantly grown in the last few decades. There is a huge demand for skilled web developers across the globe. There are opportunities for front-end, back-end and full stack developers in high-end companies, start-ups and even as freelancers.

Over the years, the technology stack for web development has also significantly changed. There is an advent of a number of frameworks, libraries and tools. With the help of these latest inventions in the world of web development, developers are able to build interactive and dynamic websites easily and in a more efficient manner.

If you are interested in the world of technology then let me tell you it’s a good time to start your career in web development. It is not only a promising field in terms of career and remuneration but web development also gives you a chance to express yourself creatively.

As expected, the job market of web developers is competitive, it’s easy to build a website but it’s not easy to get your first job as a web developer. But hold on, we aren’t scaring you. There is a way you can ace your web development interview.

In today’s blog we have compiled a list of top 20 web development interview questions that will help you get a job a web developer in your dream company. The blog consists of combination of questions that can be asked from a front-end, backend or even a full stack developer. We have tried to touch upon every important topic related to web development. We hope you make the most of it!

Q1) What is web development?

A1) Web development is the process of building websites over the internet or an intranet. It consists of a series of activities that includes designing the UI/UX, implementing it through code and then connecting the website to a database using backend languages.

Q2) What is client-side development?

A2) Client-side development also known as the front-end development is basically a collection of all things are displayed or executed at the end user device. It is all the code that runs on the client side. The most popular languages of client-side development are HTML, CSS and JavaScript. There are some new frameworks that help in the efficient building of interactive websites.

Again, if you want to know or elaborate more upon the topic, you can refer to this article and enhance your knowledge on questions asked in front end development interview.

Q3) What is server-side development?

A3) Server-side development is popularly known as back-end development. The server-side development deals with pieces of code that runs on the server dealing with generation of content of web page. Some examples of server-side programming include querying and operating the database, access and write on a server, interact with other servers etc. Some of the popular backend languages are PHP, C++, Python among others.

Q4) Who is a full stack developer?

A4) A full stack developer is a person who is responsible for executing both front-end and back-end of a website. The full stack developer has a knowledge of the entire stack of technology that is used to develop a website or a web application. The work of a full stack developer can be thought of as a hybrid of both front-end and back-end developer.

Q5) What is MERN Stack?

A5) MERN stack is a famous stack that is used to create websites and web applications. The stack consists of both backend and frontend tools and frameworks. MERN is an acronym for MongoDb, Express, React, Nodejs. The MERN Stack refers to a collection of Javascript technologies that are used to build web applications. This stack consists of React for displaying the end result to the user (basically the front end). Mongo Db database for storing and retrieving data. Node JS for handling client and server requests and Express for making the request to the database and returning a response.

Q6) What is MEAN Stack?

A6) The MEAN stack is an acronym for MongoDb, Express, Angular, Nodejs. This stack consists of Angular for displaying the end result to the user (basically the front end), Mongo Db database for storing and retrieving data, Node JS for handling client and server requests and of course Express for making the request to the database and returning a response. In the first step, the client makes a request which goes to the Angularjs, the request is then parsed by the Node JS server. The express makes a request to the database which in this case is MongoDB. The database then returns the request. AngularJs displays the output as the final step.

Q7) Explain the importance of Javascript in web development?

A7) Javascript was designed to run on browsers and hence every browser has a Javascript engine. Chrome’s v8 engine is an example of Javascript engine. With the advent of Nodejs and other advancements, Javascript has now diversified and has moved to server-side development also. Nodejs is a framework which is used for server-side web development. React and Angular are Javascript frameworks that can be used with Javascript to make dynamic web applications.

Q8) What is Nodejs?

A8) In 2009, Ryan Dahl created the Node, a C++ program that included Chrome’s v8 engine. Nodejs allows you to run javascript code outside of a browser. Nodejs is a powerful Javascript framework used to develop server-side applications, real time web applications and other common purpose software. Applications built with the help on Nodejs is fast and highly scalable. Nodejs can generate dynamic content on webpages, it can collect data produced through forms and add, delete or modify the database you are using in your project. Nodejs is a cross platform runtime environment that means it is capable of running on various platforms like windows, LINUX, UNIX etc.

Q9) What is React?

A9) React is a Javascript library developed by Facebook in 2011. It is used to create reusable UI components. The approach used by React is component based. The approach helps in creating complex and dynamic web and mobile user interface. It is also backed by one of the largest community of developers supporting it. Some of the distinct features of React are usage of Virtual DOM, fast and efficient application performance and ease of making UI test cases.

Q10) What is the difference between React Native and React?

A10) React is a Javascript library that is used to build the UI interface as front-end web and being run on the server. React native is an extension of React. React Native allows us to create native mobile applications i.e iOS, Android and windows and it can also be used in existing mobile applications.

Q11) Draw a contrast between React and Angular?

A11) In React there is only server-side rendering while Angular supports client-side rendering. Another major difference is that React uses the Virtual DOM approach while Angular uses real DOM for its functioning. React has a single direction flow of data while Angular has a bi directional data binding. There is a difference of runtime and compile time debugging also in Angular and React respectively. Lastly, both of them have different authors. React was invented by Facebook while Angular is a product of Google.

Q12) What is the difference between website and web applications?

A12) Website is a collection of interlinked pages like Homepage, Information page and others which have a single domain name. On the other hand, a web application is a software program that is accessed on the internet. Sometimes it is seen that a web application is implemented as a part of the website or a website is implemented as a part of the web application.

Q13) What are cookies in web development?

A13) Cookies are basically data that is stored on the user’s computer by the web browsers while the user is browsing a website. Web servers gather information about the web pages that a user visits with the help of cookies.

Q14) What is the difference between cookies and local storage?

A14) Data can be accessible both at client and server side. The data is sent to the server side every time there is a cookie request. On the other hand, at the local storage, the local browser side data is accessible. The cookie data have an expiration date hence it gets deleted after some time. In local storage, there is no expiration data and the user has to remove it manually.

Q15) What are frames in HTML?

A15) When we talk about frames, the first and foremost thing that we encounter is the frameset tag. This tag can be thought of as a collection of frames that are displayed on the browser window. Frameset divides the web pages into frames using help of rows and columns. The frameset tag is used to in the header section and not inside the body tag. Each frame can contain separate HTML document.

Q16) What is the difference between frames and div tag in HTML?

A16) Frames can show more than one HTML document in the same window whereas the <div> tag defines a division or a section in an HTML document. The frame tag declares one particular window. The div tag is used to group block elements intended for particular styling. Frames can load other resources using HTML and on the other hand div tag can design local content in a particular way.

Q17) Explain CORS.

A17) CORS is an acronym for cross-origin resource sharing. It is a mechanism than enables resources on ac web page to be requested from another domain outside the domain from which the resource is originated. It uses additional HTTP headers to tell browsers to give a web application running at one origin.

Q18) What is the web development architecture?

A18) The whole scenario starts with a user opening any web application over the internet. The user then triggers a request to the web server. The transfer happens with the use of protocols like HTTP, FTP etc. We will study more about protocols later in the article. The web server forwards the request to the web application server according to the generated request. The web application server processes the request and generates an appropriate response. There will be an interaction with the database layer if the data is required to be stored for future use. The result is sent to the web server with the processed data as a response. Web server responds back to the client. The output is shown on the front-end.

Q19) What are the properties of margins in CSS?

A19) Margin as a group of properties and not just one. The set consists of margin-top, margin-right, margin-left and margin-bottom. Each of these are self-explanatory. Margin top sets the top Margin of an elements. It creates space at the top of the element. Similarly, the margin-bottom sets the margin from the bottom of the element. Margin-left and Margin-right sets the border from the left and right side of the element respectively.

Q20) What are properties and values in CSS?

A20) Property is the attribute of any CSS element and value is the specification of the property. For example, text-align and colour are the properties that means that they are the attributes of the selector we want to change. Left and black are the values that we wish to set the attributes to. The value of attribute text-align that we want to set is left and the value of attribute colour we want to set is black.

With this we come to an end of important web development interview questions. However, if you feel there are any questions or concepts of web development interview questions that we omitted or if you have any doubts regarding the topics discussed above, please feel free to ask questions and we would be more than happy to answer.

This blog was a comprehensive compilation of some possible questions that can be asked in a web development interview question. We hope you now have a clear understanding of the interview questions that will be asked if you apply for the position of a frontend developer, backend developer or a full stack web developer. If you really want to become a successful web developer then apart from the theoretical knowledge, you should also undergo professional training.

Konfinity ‘s Web Development Course is curated by experts from IIT DELHI together with tech companies like Amazon, Microsoft and Google. It is trusted by students and graduates from IIT, NIT, DTU, Amity, DU and more.

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