ASP.NET MVC Interview Questions and Answers

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Routing,Model, Views and Controllers in ASP.NET MVC 

ASP.NET MVC Interview Questions And Answers Part-1

Q1. What is MVC?

MVC stands for Model-View-Controller, which is a software architectural pattern commonly used in developing web applications.

Q2. Explain the MVC design pattern.

MVC design pattern separates an application into three main components: Model, View, and Controller. The Model represents the data and business logic, the View displays the user interface and the Controller handles user input and updates the model and view accordingly.

Q3. What is Domain Driven Design and Development?

Domain-Driven Design (DDD) is an approach to software development that focuses on understanding the business domain and modeling it in software. It emphasizes collaboration between domain experts and developers to create a model that reflects the real-world problem domain.

Q4. What is the MVP pattern?

MVP stands for Model-View-Presenter, which is another software architectural pattern similar to MVC. In MVP, the Presenter acts as an intermediary between the Model and the View, handling user input and updating the model and view accordingly.

Q5. What is the MVVM pattern?

MVVM stands for Model-View-ViewModel, which is a design pattern commonly used in developing user interfaces. In MVVM, the ViewModel acts as an intermediary between the View and Model, providing data and behavior to the view while keeping the model separate.

Q6. What is ASP.NET MVC?

ASP.NET MVC is a web application framework developed by Microsoft that implements the MVC pattern for building dynamic web applications.

Q7. How does the MVC pattern work in ASP.NET MVC?

In ASP.NET MVC, the framework routes incoming requests to a controller, which processes the request, interacts with the model to retrieve data, and then passes the data to the view for rendering.

Q8. How do Model, View, and Controller communicate with each other in ASP.NET MVC?

The Controller receives input from the user and decides which actions to take. It interacts with the Model to retrieve or update data and passes the data to the View for rendering. The View displays the data to the user and sends user input back to the Controller.

Q9. What are the advantages of ASP.NET MVC?

Advantages of ASP.NET MVC include separation of concerns, testability, and flexibility in managing application complexity.

Q10. Explain the brief history of ASP.NET MVC.

ASP.NET MVC was first released by Microsoft in 2009 as an alternative to ASP.NET WebForms. It was designed to provide developers with a more structured approach to building web applications using the MVC pattern.

Q11. What is the difference between 3-layer architecture and MVC architecture?

In a 3-layer architecture, the application is divided into three layers: presentation layer, business logic layer, and data access layer. MVC architecture, on the other hand, separates the application into three components: Model, View, and Controller, providing a more granular approach to organizing code.

Q12. What is the difference between ASP.NET WebForm and ASP.NET MVC?

ASP.NET WebForms is a web application framework that follows the event-driven programming model, while ASP.NET MVC follows the MVC pattern. WebForms provides controls with server-side events, while MVC provides more control over HTML and JavaScript.

Q13. What is ViewModel in ASP.NET MVC?

ViewModel in ASP.NET MVC is a class that represents the data and behavior needed by a view. It is used to pass data from the controller to the view and can contain additional properties and methods specific to the view's requirements.

Q14. Explain the ASP.NET MVC pipeline.

The ASP.NET MVC pipeline is a series of steps that are executed when a request is made to an MVC application. These steps include routing, controller instantiation, action execution, and rendering the view. Each step in the pipeline can be customized or extended to modify the behavior of the application.

ASP.NET MVC Routing and View Engines

Q1. What is Routing in ASP.NET MVC?  

Routing in ASP.NET MVC is the process of mapping incoming URLs to controller actions and parameters. It determines which controller and action should handle a particular request based on the URL structure.

Q2. How to define a route in ASP.NET MVC?       

Routes in ASP.NET MVC are defined in the RouteConfig.cs file within the App_Start folder. Routes are typically defined using the MapRoute method, specifying the URL pattern, controller, action, and optional parameters.

Q3. What is Attribute Routing and how to define it?

Attribute Routing is an alternative way to define routes directly on controller actions or controllers using attributes. This allows for more granular control over routing and can make route definitions more explicit and concise.

Q4. When to use Attribute Routing?       

Attribute Routing is useful when you need to define routes that are specific to certain actions or controllers, or when you want to define routes directly within the controller or action where they are used.

Q5. How to enable Attribute Routing in ASP.NET MVC?  

Attribute Routing is enabled by default in ASP.NET MVC. However, if you need to ensure it's enabled, you can do so by adding the following line to the RegisterRoutes method in RouteConfig.cs: routes.MapMvcAttributeRoutes();

Q6. How to define Attribute Routing for Area in ASP.NET MVC? 

Attribute Routing for areas is defined similarly to regular Attribute Routing but is scoped within the area's route configuration file. You can apply the RouteArea attribute to controllers or actions within the area to define routes specific to that area.

Q7. What is the difference between Routing and URL Rewriting? 

Routing determines which controller and action should handle a request based on the URL structure, while URL Rewriting changes the URL itself before it reaches the server. Routing is typically used in MVC frameworks, while URL Rewriting is more commonly used in traditional web forms applications.

Q8. What are Route Constraints in ASP.NET MVC?           

Route Constraints in ASP.NET MVC allow you to restrict which URLs match a particular route by applying constraints to route parameters. Constraints can be used to validate parameter values against a specific pattern, such as requiring a parameter to be numeric or alphanumeric.

Q9. How is the route table created in ASP.NET MVC?      

The route table in ASP.NET MVC is created during application startup by the RouteConfig class in the App_Start folder. It defines the routes that the application will use to match incoming URLs to controller actions.

Q10. What are important namespaces in ASP.NET MVC? 

Some important namespaces in ASP.NET MVC include System.Web.Mvc for MVC-specific classes and functionality, System.Web.Routing for routing-related classes, and System.Web.HTTP for Web API functionality.

Q11. What is a View Engine?     

A View Engine in ASP.NET MVC is responsible for rendering the view markup (HTML, XML, etc.) based on the data provided by the controller. It translates Razor or WebForms syntax into HTML that can be displayed in the user's browser.

Q12. How does a View Engine work?     

A View Engine works by taking the view template provided by the developer (written in Razor or WebForms syntax) along with the data passed from the controller and generating the final HTML output that will be sent to the user's browser.

Q13. What is Razor View Engine?            

Razor View Engine is the default view engine used in ASP.NET MVC. It provides a simple syntax for embedding server-side code (C# or VB.NET) within HTML markup, making it easy to generate dynamic content in views.

Q14. How to make a Custom View Engine?         

To create a custom view engine in ASP.NET MVC, you need to inherit from the abstract base class ViewEngine and implement the necessary methods to handle view location and rendering.

Q15. How to register a Custom View Engine in ASP.NET MVC?    

You can register a custom view engine in ASP.NET MVC by adding an instance of your custom view engine to the ViewEngines.Engines collection during application startup, typically in the Application_Start method in Global.asax.

Q16. Can you remove the default View Engine in ASP.NET MVC? 

Yes, you can remove the default view engine in ASP.NET MVC by clearing the ViewEngines.Engines collection during application startup and only registering your custom view engine(s).


ASP.NET MVC Interview Questions And Answers Part-4

ASP.NET MVC Interview Questions And Answers Part-3

ASP.NET MVC Interview Questions And Answers Part-2