Top 10 Interview Questions on C#
1. What is C#?
Provide an overview of C#, its history, and its role in the .NET framework.
2. Explain the difference between value types and reference types in C#.
Discuss how value types and reference types behave differently in terms of memory allocation and assignment.
3. What is the difference between "abstract classes" and "interfaces" in C#?
Compare and contrast abstract classes and interfaces in C#, including when to use each and their implications.
4. What are delegates and events in C#?
Describe how delegates enable function pointers and how events are used to implement the publish-subscribe pattern in C#.
5. Explain the concept of polymorphism in C#.
Define polymorphism and demonstrate how it's achieved in C# using inheritance and interfaces.
6. What is the purpose of the "using" statement in C#?
Discuss the role of the "using" statement in managing resources and ensuring proper cleanup.
7. What is the "async/await" feature in C# used for?
Describe how the "async" and "await" keywords are used to handle asynchronous operations in C#.
8. How does exception handling work in C#?
Explain the try-catch-finally blocks, custom exception classes, and the differences between checked and unchecked exceptions.
9. What is LINQ (Language Integrated Query) in C#?
Introduce LINQ and its purpose in providing a uniform query syntax for various data sources.
10. Explain the difference between "structs" and "classes" in C#.
Differentiate between structs and classes in terms of memory storage, behavior, and use cases in C#.