Common Programming Interview Questions and Answers


So you have a Programming interview coming up and you don’t know where to start? Relax! This guide will take you through the most common Programming interview questions with detailed answers and explanations. By the time you’re finished, you’ll be ready to ace your interview and land the job of your dreams.

1. What drew you to computer science? 

Although many people may be drawn to computer science because they enjoy programming or designing algorithms, I was hooked from a young age on the creativity that comes with programming and designing algorithms. From tinkering around with machines at home to solving complex problems in my math classes, I loved finding solutions by working through problems step-by-step.

Computer science has unlimited potential to help me in my future career. It teaches you how to think critically, solve complex problems, and work collaboratively as part of a team. Plus, once you have your degree in hand it’s never too late to pursue your passion—there are always new opportunities opening up for those who are willing to learn and explore.

2. Why do you want to become a programmer? 

If you can answer the following questions, it will help us better understand your reasons for wanting to become a programmer.

1. What do you see as the biggest benefits of becoming a programmer? 
2. Why are you interested in this particular field? 
3. How would becoming a programmer benefit your future career goals? 
4. Do you have any experience coding or programming languages? If so, which ones and what kinds of projects did you work on?

3. Do you have any experience with object-oriented programming? 

You must have knowledge of at least one object-oriented programming language. You can choose C++ or Java for an entry-level programming interviews.

4. How would you approach solving a problem that involves multiple solutions?  

When you’re asked to solve a problem that involves multiple solutions, your mind will go into overdrive. You’ll likely start with one solution and work your way backwards until you find the root cause of the issue. This process can be time-consuming and often results in unnecessary duplication of effort.

To prevent this from happening, try these tips: 
1) Have a clear definition of the problem before starting to solve it. Once you have a good understanding of what’s wrong, it’ll be easier to focus on finding the right solution rather than trying to assemble all the pieces at once. 
2) Break down large problems into smaller ones. When tackling a complex issue, break it down into separate parts so that each part is more manageable and less intimidating. This will help organize your thoughts and reduce stress while solving the puzzle).

5. Can you walk me through an example of how you would create a simple program? 

This is the fifth and final question in our series of interview questions and answers. In this section, we will ask you to walk us through an example of how you would create a simple program by using one of the most common programming languages on the market – C.

C is a versatile language that can be used for a variety of tasks, such as system programming, application development, and even graphics processing. To begin creating your program, you first need to identify what goals you want to achieve with it. Once you have decided on your objectives, you can start developing your code using various techniques and libraries available in C. Finally, once your program is complete, it will need to be compiled into an executable form so that it can be run on a computer or device.

6. When writing code, is the use of unit tests and testing frameworks important to you?  

Unit tests and testing frameworks are important for code quality in the same way that documentation is important for code clarity. Unit tests and testing frameworks help to prevent bugs from creeping in, speed up the development process, and provide a check on your code’s correctness. In addition, they can be used as an effective training tool — helping new team members understand how your application works before writing any actual lines of code.

Even if you aren’t using unit tests or a testing framework yet, it’s worth considering their importance when writing code. When you write reliable and readable software with minimal defects, everyone who uses it will benefit. So start thinking about unit tests and Testing frameworks now to crack a Programming interview.

7. Have you ever had to debug code or troubleshoot problems on your own? If so, how did you go about it? 

Debugging code or troubleshooting problems on your own can be difficult, but it’s something that you need to do in order to become a better developer. There are a few ways that you can go about debugging code or troubleshooting problems on your own:

1. Search for online resources and forums where developers have already solved the problem. This is often the easiest way to get started because there are usually lots of helpful, experienced people who will be happy to share their knowledge with you.
2. Use trial and error – Just like solving puzzles, sometimes trying different solutions until you find one that works is the best way to learn something new, this approach works well when trying to debug code or troubleshoot problems on your own. When faced with an unknown issue, start by investigating what might be happening at a low level and then work up from there if necessary.
3. Use video tutorials – If video tutorials aren’t available online then another option would be viewing videos offline via YouTube or elsewhere. A lot of experienced software developers also offer free lectures and webinars as part of their training offerings which can help coders learn more effectively too 

8. Are there any languages that are particularly tricky for you to work with, and if so, why? 

C is an interpreted language, which can make it difficult to debug programs. It has a low-level syntax, which makes it difficult to read and understand code. C is also an awkward language for beginners.

8. Are there any languages that are particularly tricky for you to work with, and if so, why? 
The answer to this question depends on your experience working with languages in general and specifically with C programming. However, some of the more common difficulties experienced when working with C include: 
1) Difficulty understanding the code written in plain English; 
2) Difficulties interpreting variable names; 
3) Lack of familiarity with pointers or array notation; and 4) Incorrect usage of operators (such as + instead of ++).

9. Do programs need to be executed in a specific order for them to work correctly or is that something that can be configured depending on the situation?  

Programs can be executed in any order, and it is possible to configure them depending on the situation. In general, though, programs should always start at the main() function and work their way down to lower-level functions. This ensures that all of your code is run simultaneously, regardless of where it is located in your source file. If you are able to complete this task then you can surely crack that Programming interview.

10. What kind of design patterns are most common in software development, and which ones are your favourite?  

In this blog post, we’ll be discussing the 10 most commonly used design patterns in software development. After reading it, you should be familiar with their properties and use cases.

The SOLID principles are a set of guidelines for structuring your codebase in a way that makes it easier to maintain and read. They include the Interface Segregation Principle (ISP), which states that each class should have one well-defined interface, the Dependency Injection Principle (DIP), which says that classes should not depend on other components outside of their own module, and the Open Closed Principle (OCP), which advices against using too many open or closed methods within a single class.

Your favourite design pattern is probably one of the SOLID principles, such as the Interface Segregation Principle or the Dependency Injection Principle. These patterns facilitate uniformity and easy maintenance by ensuring all classes follow a specific structure and adhere to common conventions. Additionally, they help prevent complexity from snowballing into unpredictable chaos downline.


Thank you for taking the time to read this blog post. We hope that it has provided you with some useful information about computer science, programming, and problem-solving. Now you are aware of common programming interview questions and their answers. If you have any additional questions, please feel free to contact us. Thanks for reading and Best wishes for your next Programming interview.

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