How to use the C# MCQ Quiz
- 1. Choose the length10 random C# questions, or all 25. Untick shuffle for a fixed order.
- 2. AnswerPick an option and see straight away whether it's right, with a one-line reason.
- 3. See your scoreFinish to get your score and a review of every question with the correct answer.
What the quiz covers
The quiz covers the C# fundamentals asked of .NET freshers and junior developers, including modern features like records. The 25 questions are grouped into 9 areas, shown above each question: Basics, OOP, LINQ, Async, Memory, Delegates, Types, Modern C#, .NET.
A sample question explained
"Why avoid async void methods?" The answer is Callers can't await them and exceptions can crash the process. Use async Task, except for event handlers. If the interviewer follows up, mention that exceptions thrown in async void methods can't be caught by the caller.
More questions you'll meet
A few of the other C# questions in the bank:
- What does the ? in int? mean?
- Which keyword prevents a class from being inherited?
- Which keyword lets a derived class change a base method's behaviour polymorphically?
- What does LINQ's Where do?
- What does async/await do in C#?
- How is memory for objects reclaimed in .NET?
- Func<int, int, int> represents a method that
Study tips
- Try each LINQ question in a quick console app with dotnet run.
- Know the difference between override and new by heart; it's a favourite trick question.
- Aim for at least 20 out of 25 on two separate attempts before you treat C# as revised; one lucky score can hide gaps.
Questions and options are shuffled on each attempt, so a retake is a fresh test. The C# questions were written by Uncodemy for practice; they aren't copied from any exam or company test.
Frequently asked questions
Which .NET version do answers follow?
Modern .NET (6 and later) and C# 9+ features such as records.
Does it cover ASP.NET Core?
Lightly. Two questions touch ASP.NET Core and Entity Framework Core.
Is the C# MCQ quiz free?
Yes. Every question in the C# MCQ quiz can be answered without signing up. When you finish your first round, we ask once for your name and WhatsApp number to show your score; after that the C# MCQ quiz and every other Uncodemy tool open straight away.