C# Interview Questions for Freshers
Preparing for your first C# interviews? This set is curated for freshers and early-career developers (0–2 years): the 27 questions that come up most for entry-level roles, each with a clear answer, example code and follow-ups.
27 C# questions
- 1Predicate vs Func vs Action delegatesIntermediate
- 2Exception Handling: Best Practices for Enterprise AppsIntermediate
- 3Task vs Thread: Resource ManagementIntermediate
- 4Dependency Injection Lifetimes: Transient, Scoped, SingletonIntermediate
- 5Generics: Constraints and Type SafetyIntermediate
- 6Extension Methods: Rules and Best PracticesIntermediate
- 7LINQ Deferred Execution and Immediate ExecutionIntermediate
- 8Delegates vs Events: Architecture and ImplementationIntermediate
- 9IEnumerable vs IQueryable: Performance and Use CasesIntermediate
- 10How async and await work internallyIntermediate
- 11The role of Constructors and DestructorsBeginner
- 12Difference between String and StringBuilder performanceBeginner
- 13What is the Managed Code and the CLR?Beginner
- 14Interface vs Abstract Class: When to use which?Beginner
- 15Understanding Access Modifiers in C#Beginner
- 16Difference between 'ref' and 'out' parametersBeginner
- 17The purpose of IDisposable and the 'using' statementBeginner
- 18What is Boxing and Unboxing with memory impactBeginner
- 19Explain the Stack and the Heap memory in C#Beginner
- 20Difference between Value Types and Reference TypesBeginner
- 21C# Interview Question 2 (Free)Intermediate
- 22C# Interview Question 5 (Free)Intermediate
- 23C# Interview Question 4 (Free)Beginner
- 24C# Interview Question 1 (Free)Beginner
- 25C# Advanced Interview Question 10Beginner
- 26C# Advanced Interview Question 8Intermediate
- 27C# Advanced Interview Question 7Beginner
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Frequently asked questions
Which C# questions do freshers (0–2 years) get asked?
This page collects 27 C# interview questions aligned with freshers (0–2 years), ranging across the difficulty levels that match that experience band.
How do I prepare for a C# interview with my experience level?
Work through these questions in order, make sure you can explain each answer out loud, and pay attention to the real-world examples and follow-ups — interviewers at this level care as much about reasoning as the final answer.
Do the answers include code and examples?
Yes — answers include explanations, code examples where relevant, common mistakes to avoid and follow-up questions so you are ready for the full interview conversation.