Top 10 Interview Questions for a Full-Stack Developer 2023

Are you a full-stack developer who wants to ace your next interview? Well, you’ve come to the right place. In this blog, we’ll discuss the most asked interview questions and how you should answer them!

Full-Stack Developer Interview Questions

Question 1 

What is Full Stack Development?

Full Stack development involves all aspects of the development process, from the front-end user interface to the back-end server and database integration. It is a comprehensive approach covering all aspects of development, including

• Design
• Development
• Testing
• Deployment

Question 2

What do Full Stack Web Developers do?

Full-stack web developers are responsible for developing and maintaining the front-end and back-end of a website or application. They are responsible for creating the user interface, developing the application's logic and functionality, and ensuring its performance and scalability. 

In addition, they are also responsible for debugging and troubleshooting any issues that may arise. They have a strong understanding of client- and server-side technologies and work with multiple programming languages.

Question 3

Can you Name a Few Full-Stack Web Developer Tools?

• Visual Studio Code
• WebStorm
• Electron
• CodePen
• GitHub

Question 4

What is CORS?

CORS is an acronym for Cross-Origin Resource Sharing. It enables requests for resources on a website from other domains apart from the domain it initially requested. It is a way of relaxing the same-origin policy that browsers enforce.

CORS allows a web page to access resources from a different domain, such as,

• A script
• An image
• A style sheet 

Question 5

What is Referential Transparency?

Referential transparency is an expression that can be replaced with its value without changing the program's behaviour. In other words, if you replace an expression with its value, the program will still produce the same result.

This concept is important in functional programming languages, as it allows for more efficient code and easier debugging. Referential transparency can also create more reliable code for easier testing and verification.

Question 6

What is Version Control?

A version control system is software that tracks and manages all the changes made to a file, folder, or collection of files over time. It stores and tracks changes to source code, documents, images, and other types of files. 

Version control systems are essential as they allow large teams to collaborate on projects, track changes, and revert to a previous file version if and when needed. The most common version control system used in Git.

Question 7

What is Pair Programming?

Pair programming is a software development method where two developers collaborate at the same workstation. The two developers work together to write code, review each other's code, and discuss ideas and strategies. 

This technique is beneficial for improving the quality of the code and developing a better understanding of the problem at hand. It also helps to ensure that the developers are on the same page and that everyone is working towards the same goal. 

Question 8

What is a Dependency Injection?

A dependency injection allows for the decoupling of components in a system. It is a way to inject the dependencies of one object into another so that the objects are not tightly coupled. 

Dependency Injection is a way to make a system,

• More modular
• Extensible
• Easier to maintain

It allows for a loosely coupled architecture, making changing or replacing components easier without affecting the rest of the system. Dependency Injection can improve testability by making it easier to mock or stub out dependencies.

Question 9

What is Multithreading, and How is it Used?

Multithreading is a technique that allows a single process to have multiple threads of execution. Each thread can act as its processor and run independently of the others, allowing the process to perform multiple tasks simultaneously. 

Multithreading is used in full-stack to enable applications to take advantage of multiple processors or cores, allowing them to run faster and more efficiently.  Multithreading can also improve the user experience, allowing applications to respond more quickly to user input. 

Question 10

What is a Callback in JavaScript?

A callback in JavaScript is passed as an argument to another function and executed after the outer function has been completed. 

Callbacks are used to make sure certain code doesn’t execute until the previous code has finished. This is especially useful when working with asynchronous code, such as when making an AJAX request or with a library like jQuery.

Conclusion

Full-stack developers are highly sought-after professionals in the tech industry. They are responsible for creating and managing a website or application's front, and back ends. As such, they must possess a wide range of skills and knowledge to be successful. 

To learn more about full-stack web development, check out the courses like Post Graduate Program in Full Stack Web Development and Pre-Graduate Program in Full Stack Web Development by Skill-Lync. We provide courses in all the major engineering domains.  So what are you waiting for? Start your learning journey with Skill-Lync!