C# Interview Questions (Programming Coding, C# OOPs, multithreading)

C# is a widely demanded programming language used by the experts worldwide. This is a versatile programming language with cross-platform features. With a strong understanding of basics, you can always take your career in heights and grep the dream job in the software industry.

C# can be used for many operating systems and Windows too. In this blog for C# interview Questions, we have given top 50 questions that are necessary to learn to make you stand out from the crowd.

C# Interview Questions

As C# is a vast topic, we have divided the topic into five major categories to make the learning easier for you as given below –

  1. C# Interview Questions
  2. C# Coding Interview Questions
  3. C# Oops Interview Questions
  4. C# Programming Interview Questions
  5. C# Multithreading Interview Questions

Let us dive deep into the topic and discuss on each of the categories one by one throughout the article.

C# Interview Questions

Here is the list of top 10 C# Interview questions that are suitable for both beginners and experienced as well. These are the basic questions that are asked to check your knowledge and the basic programming skills.

  1. What is C# and different types of comments in C#?
  2. Can you execute multiple catch blocks together in C#?
  3. How will explain the difference between three – public, static, and the void?
  4. What are the constructors and destructors in C# programming language?
  5. Do you know about the term Jagged Arrays in C#?
  6. What is serialization and deserialization?
  7. What is the meaning of “this” keyword in the static method?
  8. How will you differentiate the ref and the out parameters?
  9. What are the interface classes?
  10. How will you define the sealed classes in C#?

C# Coding Interview Questions

In this section, we will focus on top 10 C# coding interview questions that are really helpful in accelerating the preparation and selection process.

  1. What is the scope of public, private, and protected members in C#?
  2. How can you encapsulate the objects or functions on C#?
  3. How will you define nullable types in C#?
  4. What is the objective of defining access specifiers in C#?
  5. How will you define pointers in C#, either by value or reference?
  6. How can you define a function that could accept an infinite number of arguments?
  7. What is Enumeration in C#? Explain with example.
  8. What is Inheritance? Do multiple inheritances is supported in C#?
  9. What do you mean by early binding either static or dynamic?
  10. What is function overloading or function overriding technique?

C# Oops Interview Questions

C# is an object-oriented programming language used by the developers worldwide to design secure business applications. Here we have given top 10 C# OOPS Interview questions that should be learned by all the developers looking for a job in the .net field.

  1. How will you define an object and a class in C#?
  2. What are the basic OOPs concepts followed by the C# programming language?
  3. Do you have any idea of manage and unmanaged code?
  4. How will you define the interface in C#?
  5. Name the different type of classes that are frequently used by C# programmers?
  6. What do you mean by the code compilation?
  7. How will you differentiate a Class and a Struct from each other?
  8. What do you mean by the abstract method and the virtual method?
  9. What is the meaning of namespace in C#?
  10. What is polymorphism and multithreading in C#?

C# Programming Interview Questions

You can improve the C# programming skills if you are sure on basics and their respective syntax too.  For your reference, we have given top 10 C# programming interview questions in this section that are frequently asked by interviewers.

  1. When should you use continue and break statements in C#?
  2. What is an Array? Write the syntax for a multi-dimensional array in C#.
  3. How will you differentiate the finally and finalize block?
  4. How will you define the properties of an Array?
  5. What is a Strong keyword and how can you define its properties?
  6. What do you mean by the Escape Sequence and give a few examples too?
  7. How can you define the Regular Expressions and its usage?
  8. What is Parsing and how will you parse a data string in C#?
  9. Name a few string operations and how can you use them?
  10. What are the events? How can delegates and events be used together?

C# Multithreading Interview Questions

Here are the top 10 C# multithreading Interview questions that are asked by the interviewers most of the times. Don’t forget to prepare these questions when you are planning for a C# interview in the near future.

  1. What is multithreading in C#? Explain with example
  2. What is the different between a process and thread?
  3. Which Namespace is used to achieve the multithreading in C#?
  4. What is a dead block condition in C# and how can you prevent it?
  5. How will you differentiate the multitasking and multithreading in C#?
  6. What is the thread pool and explain its benefits too?
  7. How will you stop a thread running from a long time?
  8. What is the meaning of mutex in C#?
  9. How will define and detect the state of a thread?
  10. What do you mean by ‘suspend’ and ‘resume’ in threading?

All the best for your next C# Interview! Don’t forget to share your experience with us and how these questions helped you during the interview.