Most Frequently Asked Full Stack Development Interview Questions and Answers


If you are about to appear for a full stack development professional interview? Then this blog is for you. Here you will get the top most asked interview questions and answers for full stack web developers.

As technology grows more and more advanced, the capabilities of businesses and organizations around the world are increasing. Their reach is expanding exponentially and at a very fast rate. As a result of this, they are attempting more and more ambitious ventures and larger and larger projects.

In the case of software development at least, these larger projects require much more manpower. When companies have to hire and manage large teams of software developers, it becomes a massive strain on their resources and budgets.

Also Know How to Become a Full Stack Development Professional?

Thus for software development projects, companies try to avoid hiring large teams of software developers by hiring only full stack developers, typically 1 or 2 per project.

A full stack developer is a software developer who is proficient in programming both the front-end and back-end components of a software application.

So he can develop both client-side and server-side parts of a software application by himself and by hiring him companies are relieved of the need to hire large teams of software developers. One can become a full stack developer by taking a Full Stack Developer Certification course.

Some Full Stack Development Interview Questions And Answers -

Q1. Which is your favorite programming language and why?

A: A full stack developer should be proficient in programming in several different languages. This is because he has to develop both the front-end and back-end components of a software application by himself.

So he should not have a favorite programming language but should be able to demonstrate that he is conversant with several.

The list of programming languages he should know very well includes HTML, CSS, Javascript, Java, PHP, .NET, Ruby, Python, SQL, Javascript, etc.

He should be a versatile programmer and shouldn’t be overly attached to any particular programming language.

He should be able to switch between them easily and smoothly. In fact, if he is overly attached to any particular programming language, it might limit his programming abilities as he might lock himself into a particular programming paradigm and become inflexible. All these skills are automatically inculcated in an individual who enrolls in Full Stack developer certification and training.

Q2. How do you keep an up to date fund of knowledge about the industry?

A: This question can be answered easily by an individual who enrolls in a Full Stack developer certification online.

In order to answer this question satisfactorily, a full-stack developer will have to be prepared in advance. He should make it a point to attend programmer community meetups regularly.

He should keep searching for such meetups in his area or even travel to other locations if there are none taking place close to his residence. Expert full stack developers always keep adding meetups, conferences, webinars, and other talks to their resumes.

In addition to enhancing their resume, it also helps them keep their knowledge up to date. This way they are constantly aware of the latest trends and developments in their field. One should also keep attempting new personal projects to apply this newly gained knowledge in a hands-on and practical way.

Q3. What are the advantages of choosing a full stack developer?

A: There are several advantages that a company gains by hiring full stack developers. Some of them are as follows -

  • Communication problems simply go awaySince a full stack developer is essentially a one-man team, he does not need to communicate with any other team members. Also, since he holds all the knowledge required to work on a project, he doesn’t have to consult with the management personnel that often as large teams have to frequently.
  • Huge reduction in the cost of the project –A full stack developer can usually work on a software application by himself and does not need the help of other software developers. This results in the entire software application being developed by a full stack developer. So the company can save a lot of resources because they do not have to hire more than one software developer.
  • Rapid creation of prototypesSince a full stack developer works alone, he doesn’t need to consult with any other team members or the management staff about a project. All the required knowledge about a project stays present in one person. So a full stack developer can program and create prototypes very rapidly because he has all the required knowledge at his fingertips.
  • Work on the front-end and back-end progresses simultaneously –A full-stack developer is well acquainted with both the front-end and back-end components of a project. Usually on a project first the back-end is developed and only after that can work on the front-end begin. But since a full stack developer is a one-man team who holds all the required knowledge about the project in his mind, he can switch between working on the front-end and back-end easily.

Nowadays companies have realized that they can gain these advantages by training their own senior employees by sponsoring them with Full Stack Certification Training.

Q4. Define front-end and back-end.

A: Front-end – 

The front-end is one of the main parts of a software application. It is the part that is fully visible to the client. This is why it is also called the client-side of an application.

It is through the front-end part that the client interacts with the software application and through which the functioning of the software application is exposed to the client.

The front-end is the primary factor that decides how the user experience of the client will be since it is through the front-end’s user interface that the client interacts with the application.

Front end technologies include jQuery, Bootstrap, React.js, AngularJS, CSS, HTML etc.

Back-end -

The back-end is the part of a software application is the part that is responsible for actually making it run. This part is not visible to the user and operates with all the ‘under the hood’ technologies.

It contains the heavy and technical parts of the software application such as the servers and databases. For this reason, it is also called the server-side part of the software application.

Back-end technologies include Javascript, SQL, Python, Ruby, .NET, PHP, etc.

Q5. What is Pair-programming?

A: Pair programming is one of the most radical concepts of the Agile principles of software development. In it, two programmers or software developers work together on the same terminal. They are called pair programmers.

One of them is called the ‘driver’ and the other is called the ‘navigator.’ The driver’s responsibility is to type out the actual coding and handle the immediate task directly. Agile terms these immediate tasks as the ‘tactical’ aspects of programming. The navigator has to review each line of code that the driver types and check it for errors or mistakes.

While the driver types the navigator also has the responsibility of thinking of improvements that can be made to the code with regards to the structure of the code, the algorithms being used, and the paradigms which have been adopted. Agile terms these as the ‘strategic’ aspects of programming.

So the driver types out the actual code and uses the navigator as a safety mechanism and a guide. The methodology of pair-programming is one of the core concepts of any Full Stack Development Professional certification course.

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