Class Central is learner-supported. When you buy through links on our site, we may earn an affiliate commission.

Udemy

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

via Udemy

Overview

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

What you'll learn:
  • Prepare for 50 essential C# interview questions. With bonus questions, learn answers to 150 interview questions in total!
  • Explore advanced C# topics: events, lambda expressions, reflection and more.
  • Get ready for tricky questions by gaining a deep understanding of the C#-related topics.
  • Gain an in-depth understanding of the fundamental C# collections.
  • Learn crucial design principles and best coding practices.
  • Practice by solving in-browser coding exercises.
  • Get two free e-books!
  • Get to know 5 popular design patterns.

Welcome to the "C#/.NET - 50 Essential Interview Questions (Mid 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 string and StringBuilder?"


This course covers 50 essential C# interview questions, plus bonus questions, bringing the total to 150 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# advanced topics, collections, 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.


This course is focused on topics that you are most likely to talk about during interviews. We will discuss various subjects, from low-level things like using reflection or the "dynamic" keyword, through modern C# subjects like pattern matching or nullable reference types, to high-level matters like design principles and patterns or good coding practices.


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.

  • Free e-book (Junior-level topics review): Explore 15 essential junior-level topics to help you get up to speed for this course.

  • 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 difference between Tuples and ValueTuples?
  • What is the difference between "is" and "as" keywords?
  • What is the use of the “using” keyword?
  • What is the purpose of the “dynamic” keyword?
  • What are expression-bodied members?
  • What are Funcs and lambda expressions?
  • What are delegates?
  • How does the Garbage Collector decide which objects can be removed from memory?
  • What are generations?
  • What is the difference between Dispose and Finalize methods?
  • What are default implementations in interfaces?
  • What is deconstruction?
  • Why is “catch(Exception)” almost always a bad idea (and when it is not?)?
  • What is the difference between “throw” and “throw ex”?
  • What is the difference between typeof and GetType?
  • What is reflection?
  • What are attributes?
  • What is serialization?
  • What is pattern matching?
  • How does the binary number system work?
  • What is the purpose of the “checked” keyword?
  • What is the difference between double and decimal?
  • What is an Array?
  • What is a List?
  • What is an ArrayList?
  • What is the purpose of the GetHashCode method?
  • What is a Dictionary?
  • What are indexers?
  • What is caching?
  • What are immutable types and what’s their purpose?
  • What are records and record structs?
  • Why does string behave like a value type even though it is a reference type?
  • What is the difference between string and StringBuilder?
  • What is operator overloading?
  • What are anonymous types?
  • What is cohesion?
  • What‌ ‌is‌ ‌coupling?‌
  • What is the Strategy design pattern?
  • What is the Dependency Injection design pattern?
  • What is the Template Method design pattern?
  • What is the Decorator design pattern?
  • What is the Observer design pattern?
  • What are events?
  • What is Inversion of Control?
  • What‌ ‌is‌ ‌the‌ ‌“composition‌ ‌over‌ ‌ inheritance”‌ ‌principle?‌
  • What are mocks?
  • What‌ ‌are‌ ‌NuGet‌ ‌packages?‌
  • What is the difference between Debug and Release builds?
  • What‌ ‌are‌ ‌preprocessor‌ ‌directives?‌

Taught by

Krystyna Ślusarczyk

Reviews

4.8 rating at Udemy based on 594 ratings

Start your review of C#/.NET - 50 Essential Interview Questions (Mid Level)

Never Stop Learning.

Get personalized course recommendations, track subjects and courses with reminders, and more.

Someone learning on their laptop while sitting on the floor.