.Net Interview Questions

What is .NET?
.NET is a software framework developed by Microsoft. It provides a runtime environment for executing applications and supports multiple programming languages like C#, F#, and Visual Basic.
What are the components of .NET?
.NET consists of the following components:
Common Language Runtime (CLR): Manages memory, security, and execution of code.
Class Library (BCL): Provides a collection of reusable classes and functions.
ASP.NET: Used for building web applications.
ADO.NET: Handles data access.
Windows Forms: Used for creating desktop applications.
What is the Common Language Runtime (CLR)?
CLR is the execution environment for .NET applications. It manages memory, handles exceptions, and ensures type safety.
What is the difference between value types and reference types in .NET?
Value types store their actual value (e.g., int, float), while reference types store references to objects (e.g., classes, interfaces).
Explain the concept of Just-In-Time (JIT) compilation in .NET.
JIT compiles MSIL code to native code at runtime, optimizing performance. It enforces type safety and converts non-native methods to native code when called.
What is MVC (Model-View-Controller)?
MVC is an architectural pattern used to build .NET applications. It separates an application into three components: Model (data), View (UI), and Controller (logic).
What does MIME stand for?
MIME stands for Multipurpose Internet Mail Extensions. It allows exchanging files over emails by specifying data types.
What is Ngen.exe in .NET?
Ngen.exe is a tool that precompiles .NET assemblies into native code, improving application startup performance.
What is Econo-JIT compilation?
Econo-JIT compiles only methods called at runtime, freeing memory after execution.
What does BCL (Base Class Library) provide?
BCL offers a foundation for .NET applications, including common functions, threading, I/O, security, and more.