Top 60 ASP.NET Interview Questions and Answers in 2025 by https://www.simplilearn.com/ Flashcards
What is ASP.NET?
ASP.NET is a server-side technology used for developing dynamic websites and web applications on the internet. It also produces data-driven web applications.
Microsoft released ASP.NET in 2002 to build dynamic websites and web applications using the .NET framework.
What platform does ASP.NET use?
ASP.NET is a cross-platform that works on the .NET framework and runs on Linux, Windows, macOS, and Docker.
What is the ASP.NET Life Cycle, and list the types of Life Cycle?
When ASP.NET pages run, it goes through several life cycle steps, which perform a series of actions like initialization, running, restoring, and rendering.
Life Cycle is classified into two categories.
- Application Life Cycle: The user requests to access the application.
- Page Life Cycle: The cycle has phases like initialization, restoring, execution, and page rendering.
What is MVC?
MVC is a software architectural pattern that divides an application into three main parts: Model, View, and Controller.
ASP.NET_Interview_Question_MVC
Model: The model helps to create the application’s data domain and represents the application’s public properties and business logic.
View: View represents the data tables, charts, and diagrams by collecting the data from the model.
Controller: The controller helps handle user interactions and controls the flow of the application.
List the languages used for ASP.NET
ASP.NET uses object-oriented programming languages that provide a framework and patterns, which are easy to use.
Languages used by ASP.NET Framework are :
C#
C-Sharp is a programming language developed by Microsoft that runs on the .NET framework.
It is used to develop web applications on the .NET framework.
VB.NET
VB.NET is a modern object-oriented programming language developed by Microsoft to combine the features of CLR and .NET.
What type of Library is used in ASP.NET?
A library is a pre-coded Object-Oriented Programming template collection used to develop web-based and desktop applications in ASP.NET.
ASP.NET uses a Web Library to develop web applications.
What is CLR?
CLR is the basic Common Language Runtime virtual machine component of the .NET framework used to run the code. It manages and executes .NET programs. And implements a Virtual Execution System (VES) internally.
Services provided by CLR
- Verification
- Garbage collection
- Security
- Memory management
What is IIS? And why do you use it?
Internet Information Server (IIS) is the most popular web server used to host and provide internet-based services to ASP.NET and ASP Web applications.
IIS has its process engine to handle the requests. Using an IIS computer can work as a web server and provide functionality for deploying ASP.NET web applications. It is also responsible for responding to users’ requests.
List types of Application Life Cycle.
Application Life Cycle is of five types:
- Application Start: Application Start is a method you execute when a user requests.
- Object Creation: Object Creation contains all the information about current requests and browsing information.
- HTTP Application: HTTP Application processes all subsequent requests sent to the application.
- Dispose: Dispose is responsible for releasing manually unwanted resources.
- Application End: Application End helps to unload the memory of an application.
List the advantages of using ASP.NET
ASP.NET is a development framework used for developing web applications. It is one of the most preferred web development technologies at present.
There are a lot of benefits of using ASP.NET. Here are some advantages:
- Applications created using ASP.NET show better performance
- ASP.NET provides multi-development modes for the applications
- Applications created using ASP.NET can be used across the globe
- ASP.NET is language-independent
What is an Active Server Page?
Active Server Page is an HTML page used to develop dynamic web pages. It includes one or more scripts on the Microsoft web server before sending the request to the user.
ASP was first released in December 1996. It is used to generate the content that is sent to the client web browser via HTTP response.
Describe Web Forms?
Web forms are web pages that a user requests using a browser. It is built using ASP.NET technology.
It executes on the server and generates output to the browser. It also allows you to add and create custom controls.
Now, have a look at some custom controls provided by ASP.NET.
- Label
- TextBox
- Button
- Hyperlink
- ImageButton
What is a Solution Explorer?
Solution Explorer displays a project’s folder and files that appear on a physical hard drive.
List the components of ASP.NET.
ASP.NET provides data-driven web applications on the internet using various components.
They are:
- Common Language Runtime
- Language
- Library
- Common Type System
- Windows Forms
What is the difference between ASP and ASP.NET?
ASP
- ASP is Microsoft’s first server-side scripting language to design dynamic WebForms.
- ASP uses ADO(ActiveX Data Objects) to communicate with the database.
- ASP is written in VBScript.
ASP.NET
- ASP.NET is a server-side technology used for developing dynamic websites and web applications on the internet.
- ASP.NET uses ADO.NET to communicate with the database.
- ASP.NET is written in C#.
What type of protocol is used to call web service?
Web service is a web-based functionality accessed by using protocols. It uses XML to exchange the software using common internet protocols.
Web service in asp.net has three aspects, they are:
- Creating web service
- Creating a proxy
- Consuming the web service
The HTTP protocol is used in ASP.NET to call a Web Service.
Explain the uses of Global.asax
Global.asax handles high-level applications like Application_Start, Session_End, and Session_Start.
Global file is also used to execute the application-level events and set application-level variables.
What is a Web Library?
A Web Library is a part of a website that accesses all libraries from the browser and helps add collections online.
- It contains base and user-defined data types
- Access to data
- Supports the creation of web services
Describe a View State.
View State is a Page-Level State Management technique that is used to preserve the values of the page and controls.
View state contains the following sections:
- Features
- Background
- Scenario
- Class Reference
What is a Multi-View?
Multi-View is a parent control for the View. It is used to control all types of views.
Multi-View has the prefix mv.
Syntax:
<asp:MultiView ID=”Name” runat=”server”>
What is Early Binding?
Early Binding is used to check the methods and properties during compilation. It is fast and easy to code and also reduces the compilation time. It also reduces the time needed to identify errors.
Example:
class Simplilearn
{
public string name;
public int roll no;
public void details(string name, int roll no)
{
this.name = name;
this.roll no = roll no;
Console.WriteLine("My name is :" + name);
Console.WriteLine("My roll no is: " + roll no);
}
}
class Simplicode
{
public static void main(String[] args)
{
Simplilearn s= new Simplilearn();
get.details(“Kumar”, 20);
s.mymethod();
}
}
What is Late Binding?
Late Binding takes more time to compile. It is hard to find out the object through Late Binding. Late Binding has dynamic objects and is achieved by virtual machines.
Example:
class Simplilearn
{
public static void main(String[] args)
{
dynamic DynObj =10;
Console.WriteLine(DynObj.GetType());
}
}
How is ASP.NET different from ASP.NET Core?
ASP.NET is used to build applications for Windows, where ASP.NET Core is used for Windows, macOS, and Linux.
ASP.NET
- ASP.NET is used to build applications for Windows.
- Uses .NET framework
- Single Version
ASP.NET Core
- ASP.NET Core is used for Windows, macOS, and Linux.
- Uses .NET Core framework
- Multiple Versions
What is Caching?
Caching is a technique used to sort the user data or information in memory. It boosts the performance of the applications and creates pages automatically.
Caching is also essential for data-related transactions.
