ASP.NET MVC Interview Questions Answers At Infosys

1) Mention what is the difference between “ActionResult” and “ViewResult” ?

“ActionResult” is an abstract class while “ViewResult” is derived from “AbstractResult” class.  “ActionResult” has a number of derived classes like “JsonResult”, “FileStreamResult” and “ViewResult” .

“ActionResult” is best if you are deriving different types of view dynamically.

2) Mention the advantages and disadvantages of MVC model?

Advantages	Disadvantages
It represents clear separation between business logic and presentation logic Each MVC object has different responsibilities The development progresses in parallel Easy to manage and maintain All classes and object are independent of each other	The model pattern is little complex Inefficiency of data access in view With modern user interface, it is difficult to use MVC You need multiple programmers for parallel development Multiple technologies knowledge is required

3) Explain what is routing? What are the three segments for routing is important?

Routing helps you to decide a URL structure and map the URL with the Controller.

The three segments that are important for routing is

• ControllerName
• ActionMethodName
• Parameter

4) Explain how routing is done in MVC pattern?

There is a group of routes called the RouteCollection, which consists of registered routes in the application.  The RegisterRoutes method records the routes in this collection.  A route defines a URL pattern and a handler to use if the request matches the pattern. The first parameter to the MapRoute method is the name of the route. The second parameter will be the pattern to which the URL matches.  The third parameter might be the default values for the placeholders if they are not determined.

5) Explain using hyperlink how you can navigate from one view to other view?

By using “ActionLink” method as shown in the below code. The below code will make a simple URL which help to navigate to the “Home” controller and invoke the “GotoHome” action.

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<%= Html.ActionLink(“Home”, “Gotohome”) %>

6) Mention how can maintain session in MVC?

Session can be maintained in MVC by three ways tempdata, viewdata, and viewbag.

7) Mention what is the difference between Temp data, View, and View Bag?

• Temp data: It helps to maintain data when you shift from one controller to other controller.
• View data: It helps to maintain data when you move from controller to view
• View Bag: It’s a dynamic wrapper around view data

8) What is partial view in MVC?

Partial view in MVC renders a portion of view content. It is helpful in reducing code duplication. In simple terms, partial view allows to render a view within the parent view.

9) Explain how you can implement Ajax in MVC?

In Ajax, MVC can be implemented in two ways

• Ajax libraries
• Jquery

10) Explain what are the steps for the execution of an MVC project?

The steps for the execution of an MVC project includes

• Receive first request for the application
• Performs routing
• Creates MVC request handler
• Create Controller
• Execute Controller
• Invoke action
• Execute Result

11) Explain how you can send the result back in JSON format in MVC?

In order to send the result back in JSON format in MVC, you can use “JSONRESULT” class.

12) Explain what is the difference between View and Partial View?

View	Partial View
It contains the layout page Before any view is rendered, viewstart page is rendered View might have markup tags like body, html, head, title, meta etc. View is not lightweight as compare to Partial View	It does not contain the layout page Partial view does not verify for a viewstart.cshtml. We cannot put common code for a partial view within the viewStart.cshtml.page Partial view is designed specially to render within the view and just because of that it does not consist any mark up We can pass a regular view to the RenderPartial method