In the UK, there's a real demand for digital and coding skills. It's estimated that employers are finding it tough to fill nearly half of all science, technology, engineering and maths (STEM) roles. Coding knowledge can be a highly valuable asset if you're in the market for a new position right now, which is good news if you're a C# developer. At the same time, however, you still need to secure that position – so preparing for C# developer interview questions is essential.
At Randstad, finding C# developer jobs you're interested in is just one way we're able to help. Another is to equip you with the confidence to perform well in an interview. That's why we believe it's so important to brush up on C# coding interview questions you may face – and the answers that'll wow a potential employer. It'll be a fantastic way to sell yourself and take your promising career as a C# coder or developer to the next level.
what do c# developer jobs involve
To prepare for an interview, you first need a good idea of what's involved with the C# developer jobs you're applying for. If nothing else, it'll help you get a feeling for some of the questions that may come up – and how you can answer them. Some C# roles and responsibilities can include:
- Programming
- Design
- Communication
- Problem solving
Of course, you'll want to include these skills when writing your CV where appropriate. Then, the next step is to communicate how you've used those skills in previous experience.
c# junior developer interview questions
To help you prepare for an interview, we gathered some of the common technical questions that may be asked. Of course, we can help you find C# developer jobs at all levels of seniority – from graduate up to the most experienced positions.
Here are some of the technical C# junior developer interview questions you may encounter:
- Describe namespaces and their purpose.
- How do you overload a method?
- To prevent a class from being inherited, what do you do?
- Describe the difference between a struct and a class.
- For a C# console application, what is the execution point?
- What advantages does C# have over C++ or Java?
- What is the purpose of a destructor?
- What is the purpose of encapsulation?
- What is the use of using statement in C#?
- Describe sealed classes in C#.
- Describe the difference between an interface and abstract class.
- Is C# code considered managed or unmanaged code?
- What is the purpose of a constructor?
- Describe the difference between public, static and void.
- Describe the difference between ref and out parameters.
- In a C# program, what types of errors can occur?
- Describe the GAC and where it is located.
- Describe DLL Hell and how .NET developer solves it.
- What differences are there between each version of MVC?
- Describe the different types of results in MVC.
- Describe the benefits of using MVC.
c# senior developer interview questions
Below are some of the more advanced technical topics that can be covered in C# senior or midweight developer interview questions.
- Describe a singleton.
- Is it possible to map multiple URLs to the same action?
- How, without escaping each backslash, do you initiate a string?
- Describe the differences between System.String and System.Text.StringBuilder classes.
- The strings in a C# are immutable. Why is this?
- Are you able to use "this" within a static method?
- Describe the difference between constants and read-only.
- Define value types and reference types.
- Describe Custom Control and User Control.
- Is it possible for a private virtual method to be overridden?
- To sort elements of the array in descending order, what should you do?
- Define circular references.
- What are some commonly used types of exceptions in .NET?
- In MVC, how can we do validations?
- Is it possible for multiple catch blocks to be executed?
- Is it possible to display all errors in one go?
- What is the purpose of assert()?
- Describe the complete flow of MVC.
- Describe the difference between ActionResult and ViewResult.
- Describe the difference between tempdata, viewdata and viewbag.
- Describe how to use nullable types in .NET.
- What would your reasons be for using untrusted verification?
- For MVC, how do you implement windows authentication?
- Using hyperlink, how can we navigate from one view to another?
- In AJAX, what kind of events can be tracked?
personal c# developer interview questions
It won't just be your technical proficiency put to the test in an interview. An employer will want to get to know you too. As such, expect some personal C# developer interview questions like:
- Describe yourself professionally in a few words.
- In our industry, what are some important trends you see?
- What are your reasons for leaving your previous/present job?
- Your resume shows you may be overqualified for this position. What is your opinion of this?
- What do you feel is an appropriate salary for this position?
- How do you remain abreast of new developments in technology?
- If your previous manager was in the room with us, what do you think they would have to say about you?
other c# developer interview questions to expect
It's a good idea to prepare for likely C# coding interview questions and answers. But there are some other types of questions you may wish to brush up on to ensure you're ready:
scenario interview questions
- Do you see yourself as a problem solver? If so, why? Can you give any examples?
company interview questions
- What do you know about our company and our products?
- Why do you want to work for this organisation?
career c# interview questions
- In two or three years from now, what do you see yourself doing?
- Describe three of your accomplishments over the past few years you are most proud of.
- So far, how successful do you feel have you been in your career?
- What long-term goals do you have?
c# developer interview questions – ready to impress
The various questions we've provided will give you a great insight into what you might face at your next job interview. You don't need to rehearse detailed answers for all of them. But it's a good way to get you thinking about how you would answer them.
Of course, other questions may come up too – including some that are specific to the job you're applying for. If so, preparing for some of the more common questions will leave you in the best position to think on the spot and come up with the answers that'll really impress.