C#/.NET - 50 Essential Interview Questions (Junior Level)

SOLID, OOP and design patterns. I conducted 250+ tech interviews and I know what is asked. Do not memorize, understand.

Why this course?

I've conducted over 250 technical interviews as a .NET Technical Lead. I've seen what separates candidates who get hired from those who don't — and it's rarely about memorizing definitions. It's about truly understanding how C# works under the hood.

This course teaches you exactly that. We go through 50 essential C# interview questions in depth, plus 110 bonus questions — 160 real-world questions total. Each one is explained so you understand why the answer is correct, not just what to say.

What makes this course different?

Most interview prep courses are question dumps — here's the question, here's the answer, memorize it. This course takes a different approach:

• We learn by coding. Topics are explained with hands-on examples, and the course includes 8 in-browser coding exercises to reinforce your understanding.

• We go deep. Each topic is broken down so you can handle follow-up and trick questions with confidence.

• We cover what actually gets asked. The questions in this course are based on real interviews, not pulled from a textbook.

  
  

What's inside?

7 hours of video covering the topics interviewers care about most:

• Object-oriented programming — inheritance, polymorphism, abstraction, encapsulation

• SOLID principles — with practical examples, not just acronym definitions

• 5 popular design patterns — when and why to use each one

• C# core mechanisms — the things that come up in almost every interview

  
  

Included with the course:

• Free e-book with all questions and answers — perfect for a quick review the night before your interview

• Printable flashcards + Anki deck — study on the go, anywhere, anytime

• Full Git repository with all the code from the lectures

• 8 in-browser coding exercises to practice as you learn

Not preparing for an interview right now?

That's fine too. Many students take this course simply to deepen their understanding of C# and fill knowledge gaps. Interview questions are a great framework for learning — they force you to think about the "why" behind every concept, which makes you a better programmer regardless of whether you have an interview coming up.

This course is covered by Udemy’s 30-day Refund Policy, so you can try it out risk-free.