Basic Interview Questions for Back-End Developers in India

20 April 2021
If you want to become a web developer but don’t know much about it, then you’ve come to the right place. In this article, we have listed the basic interview questions for back-end developers that you can expect in your job interview. Make sure you know the correct answers to these commonly asked questions when you appear for an interview as a back-end developer.
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Web development is in huge demand now. As the internet penetrates deeper and rising numbers of users are connecting to it every day there is a growing demand for skilled and experienced web developers. 

According to statistics published on, there are more than 1.8 billion websites registered online. Out of these, around 543 million from these are regularly active. Slow loading speed is the main reason why users get disenfranchised by a website because users look for a fast-loading website for faster internet browsing. Over 94% of users are impressed with the first look at the website design. 

For maximum impact, it is essential that a website runs smoothly and is completely optimised for swift- loading and easy navigation. To do this, you will need to become an expert and skilled back-end developer. 

If you want to become a web developer but don’t know much about it, then you’ve come to the right place. In this article, we have listed the basic interview questions for back-end developers that you can expect in your job interview. Make sure you know the correct answers to these commonly asked questions when you appear for an interview as a back-end developer.

Top Basic Interview Questions for Back-End Developer

This is our list of the basic interview questions for back-end developers, including the reason why the question is important as well as the ideal answer the interviewers expect from you, the candidate:

Q 1 – Which programming languages do you know? Are there any other programming languages that you are learning currently?

Importance – According to the level of experience, the types and numbers of programming languages you know should increase with time. Although you cannot be expected to know all existing programming languages you should definitely have experience with at least a few of the most commonly used ones.

Ideal Answer – You should have basic knowledge or experience with major programming languages, such as JavaScript, .NET, Python, Ruby, PHP, etc. You should show eagerness to learn new programming languages in order to enhance your skill set to achieve optimal web development practices.

Q 2 – How would you debug and improve applications and programs?

Importance – Troubleshooting and debugging are the two most commonly required aspects of the development cycle. Additionally, companies are looking for ways to improve their existing products to stay steps ahead of the competition, especially if the company provides multiple services or products. This question helps the interviewer to understand how much you know about debugging and how you usually handle troubleshooting procedures. 

Ideal Answer – You should share your debugging process in detail. It should include details of your testing process, any specific debugging tool you use to check for coding errors and how you troubleshoot potentially bugged programs and applications. 

Q 3 – What is JavaScript and why is it useful?

Importance – This technical question helps the interviewer to test the candidate’s knowledge of the most commonly- used programming language. Although technical knowledge is essential, it is the latter part of the question which carries significance. This is the best way for the interviewer to understand how you approach a website development project.

Ideal Answer – You should have a thorough understanding of JavaScript and know its importance and its use cases. Ideally, you should avoid using jargon and instead use simple descriptive language to ensure they understand your skill levels. 

Q 4 – What was the most challenging development project you’ve worked on in a team? How did you manage it?

Importance – Being a team player is extremely essential for an ideal back- end developer because web development requires streamlined efforts from different departments. Hence, interviewers need to determine that you are an ideal team player who has worked successfully as a team member in previous projects. This is an excellent way to ensure smooth inter- departmental collaboration and effective management. 

Ideal Answer – For this, you should share instances where you have successfully worked with front- end developers, designers and system administrators throughout the development lifecycle. Interviewers look for mentions of troubleshooting through collaboration which highlights your willingness to work as part of a larger team. 

Q 5 – What is your favourite app and what do you like most about it?

Importance – This question is important to understand how much you are aware of the developments in the industry. It also highlights your appreciation for application developmental subtleties. Your answers should give the interviewer an in- depth insight into a developer’s view of applications. 

Ideal Answer – You should share important aspects of your favourite applications, such as the app’s user experience, load times and ease of navigation. The interviewers are mainly looking for inspirational and motivational aspects in this answer. 

Q 6 – How do you start coding and ensure that your code is strong, well- organised and completely optimised?

Importance – This question could be an extension of the question where you are asked about your favourite programming language. You should be aware of every intricate subtlety of the programming language to be an expert back-end developer. This question helps the interviewer to figure out how you manage your codes, identify errors and troubleshoot them. 

Ideal Answer – You should share your experience with code writing. This should include performing UI tests, debugging and optimising codes to ensure error-free programming. You should use a reliable OOP to organise your codes and even use procedural programming to classify code by action instead of an object. You should show a willingness to work in sync with the entire team for the optimal web development process.

Q 7 – What are the ways you use to ensure the best development lifecycle?

Importance – Every individual, company and client choose different approaches to the development lifecycle. Although there are common aspects involved in the process there are others that are distinct. This question will help determine whether you have the capacity to handle the pressure of a project from start to finish by using innovative and efficient techniques. 

Ideal Answer – You should disclose your past experience working using the Agile approach for best development lifecycle practices. Additionally, it is even better, if you have experience with more progressive approaches, such as the Waterfall approach. You should have the ability to use different development approaches with equal ease. Interviewers also check if the candidate has past experience with unit testing to find coding flaws and logical errors. Ideally, you should have experience using multi- threading to improve application performance, MVC to separate codes and Hibernate for ORM infrastructure. 

Q 8 – Was there a time you faced an enormous obstacle during a web development project? How did you resolve it?

Importance – Every back- end developer has experienced an instance with a bug in their system or a broken code during the development stages. These are often inevitable problems in a back- end developer’s work profile. This question helps the interviewer to find out how inspired you were to fix the issue and if you asked for assistance during the event.

Ideal Answer – You should display enthusiasm to take on challenges and showcase your problem- solving capabilities. Describe the specific steps you took to overcome the challenge and the final result. A positive attitude and reaction show patience on your part which is incredibly useful for a successful back-end developer. 

Q 9 – Have you ever received negative feedback? How did you handle it?

Importance – Design and user experience are subjective. A back- end developer must be ready for criticism from client, customer, colleague or user. Ideally, you should face the situation with complete professionalism and look upon it as an opportunity to improve your development skills.

Ideal Answer – Make sure that your answer does not display signs of annoyance or frustrations as this may prove that you did not take the negative feedback well. The ideal answer for this question should detail the circumstances, the specific feedback and your approach to resolving the issue. 


An ideal back-end developer should have in-depth knowledge of programming languages, be a team player and have sufficient experience in troubleshooting. This makes the candidate incredibly acceptable and cost-effective to train for the company too. 

Learn and get tips for tackling interviews, and building a successful career in Back-End with our free Live classes with experts and our extensive library of career guidance resources by heading to the Boost page.

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