C# Interview Questions & Assessment
Evaluate C# and .NET proficiency including LINQ, async/await, dependency injection, Entity Framework, and ASP.NET Core.
Why C# Matters
C# powers enterprise applications, game development (Unity), and cloud services on Azure. The .NET ecosystem is one of the most mature and performant runtimes available.
Sample Interview Questions
Explain value types vs reference types in C#. What is boxing and unboxing?
How does async/await work under the hood in C#? Explain the state machine the compiler generates.
What is LINQ? Write a query that groups, filters, and projects data from a collection.
Explain dependency injection in ASP.NET Core. What are the three service lifetimes?
What is the difference between IEnumerable, IQueryable, and ICollection?
How to Prepare
Understand the CLR, garbage collection, and memory management
Master LINQ — both query syntax and method syntax
Know async/await patterns and Task Parallel Library
Practice with ASP.NET Core middleware pipeline and DI
Understand Entity Framework Core and its query execution model
Related Skills
Start practicing
Practice C# Interview Questions on Infyva
Get AI-powered interview practice with real-time feedback and scoring. Free plan available for candidates.