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Udemy

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

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Overview

Get ready for your next interview! An in-depth guide to C# core concepts, SOLID principles and popular design patterns.

What you'll learn:
  • Prepare for 50 essential C# interview questions. With bonus questions, learn answers to 160 interview questions in total!
  • Master fundamental concepts of object-oriented programming.
  • Learn SOLID principles.
  • Get to know 5 popular design patterns.
  • Practice by solving in-browser coding exercises.
  • Get ready for tricky questions by gaining a deep understanding of C#-related topics.
  • Get a free e-book with all answers.

Welcome to the "C#/.NET - 50 Essential Interview Questions (Junior Level)" course!


Are you looking to land your next C# job with confidence? This course is designed to help you master the most common C# interview questions, gain in-depth knowledge of key C# topics, and stand out from other candidates.


With over 250 technical interviews conducted as a .NET Technical Lead, I know exactly what hiring managers are looking for—and I’m here to help you succeed.


Curious about what to expect? Watch the free video on one of the most common C# interview questions: "What is the difference between an interface and an abstract class?"


This course covers 50 essential C# interview questions, plus bonus questions, bringing the total to 160 real-world interview questions you might face.

  • Practice makes perfect – We will learn by coding.

  • Go beyond memorization – Understand why each answer is correct.

  • Master key concepts – Deep dive into C# fundamentals, SOLID principles, and popular design patterns.


This course isn't just for those preparing for an interview. Even if you're not actively job hunting, it's a great way to strengthen your C# skills.


We will look under the hood of the C# mechanisms that are most often discussed during the interviews, so no trick question can surprise you. Each topic will be explained in detail, so you will not only be able to give the interviewer a satisfying answer to the question, but you will also gain a deep understanding of those subjects and become a better programmer.


Thanks to this course, you will be well-prepared for your next interview, and you will discuss C# matters with confidence.


Additional perks:

  • Free e-book: Get a comprehensive e-book that compiles all the questions and answers from the course, giving you a quick reference guide.

  • Flashcards deck: Printable flashcards and an Anki deck are included to help you review key concepts efficiently.

  • A Git repositorycontaining all the lectures' code.

  • 30-day money-back guarantee—if you're not satisfied, get a full refund, no questions asked.


So, why hesitate? Join me in this course and ace your next interview!

Syllabus

  • Introduction
  • What is the Common Intermediate Language (CIL)?
  • What is the Common Language Runtime (CLR)?
  • What is the difference between C# and .NET?
  • What is the difference between value types and reference types?
  • What is boxing and unboxing?
  • What are the three main types of errors?
  • How are exceptions handled in C#?
  • What are the types of access modifiers in C#?
  • What are the default access modifiers in C#?
  • What is the purpose of the "sealed" modifier?
  • What is the purpose of the "params" keyword?
  • What is the difference between a class and a struct?
  • What are partial classes?
  • What does the "new" keyword do?
  • What is the purpose of the "static" keyword?
  • What is a static class?
  • What is the purpose of the ternary conditional operator?
  • What is the purpose of the null coalescing and null conditional operators?
  • What is encapsulation?
  • What is LINQ?
  • What are extension methods?
  • What is IEnumerable?
  • What is the difference between the equality operator (==) and Equals?
  • What is the difference between deep copy and shallow copy?
  • What is the Garbage Collector?
  • What are nullable types?
  • What is a property?
  • What are generics?
  • What is the difference between the "const" and the "readonly" modifiers?
  • What is the difference between the "ref" and the "out" keywords?
  • What is the difference between an interface and an abstract class?
  • What is polymorphism?
  • What's the difference between a virtual method and an abstract method?
  • What is the method overloading?
  • What is the difference between method overriding and method hiding?
  • Does C# support multiple inheritance?
  • What is the DRY principle?
  • What is the "magic number" antipattern?
  • Why is using the "goto" keyword considered a bad practice?
  • What is the "spaghetti code"?
  • What is the Singleton design pattern?
  • What is the Builder design pattern?
  • What is the Adapter design pattern?
  • What is the Bridge design pattern?
  • What is the Factory Method design pattern?
  • What is the "S" in the SOLID principles?
  • What is the "O" in the SOLID principles?
  • What is the "L" in the SOLID principles?
  • What is the "I" in the SOLID principles?

Taught by

Krystyna Ślusarczyk

Reviews

4.8 rating at Udemy based on 887 ratings

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