Top 38 ASP.NET MVC Interview Questions And Answers

Question 1

What is ASP.NET MVC?

Accepted Answer

ASP.NET MVC is a web application Framework. It is light weight and highly testable Framework. MVC separates application into three components — Model, View and Controller.

Question 2

What is _Layout_ in MVC?

Accepted Answer

**Layout** pages are similar to master pages in traditional web forms. This is used to **set the common look across multiple pages**. In each child page we can find

```cs
@{
Layout = “~/Views/Shared/TestLayout1.cshtml”;
}
```

This indicates child page uses `TestLayout` page as it’s master page.

Question 3

Can you explain _Model_, _Controller_ and _View_ in MVC?

Accepted Answer

* **Model** — It’s a business entity and it is used to represent the application data.
* **Controller** — Request sent by the user always scatters through controller and it’s responsibility is to redirect to the specific view using View() method.
* **View** — It’s the presentation layer of MVC.

Question 4

What are `NonAction` methods in MVC?

Accepted Answer

In MVC all public methods have been treated as **Actions**. So if you are creating a method and if you **do not want to use it as an action** method then the method has to be decorated with `NonAction` attribute as shown below:

```csharp
[NonAction]
public void TestMethod()
{
   // Method logic
}
```

Question 5

Explain `Bundle.Config` in MVC?

Accepted Answer

**“BundleConfig.cs”** in MVC is used to register the bundles by the bundling and minification system. Many bundles are added by default including jQuery libraries like — `jquery.validate`, `Modernizr`, and default CSS references.

Question 6

Explain Sections is MVC?

Accepted Answer

Section are the part of HTML which is to be rendered in layout page. In Layout page we will use the below syntax for rendering the HTML – ```html @RenderSection(“TestSection”) ``` And in child pages we are defining these sections as shown below – ```html @section TestSection{

Test Content

} ```

Question 7

What is the use of `ViewModel` in MVC?

Accepted Answer

`ViewModel` is a plain class with properties, which is used to _bind_ it to strongly typed **view**. `ViewModel` can have the validation rules defined for its properties using _data annotations_.

Question 8

What are _Actions_ in MVC?

Accepted Answer

**Actions** are the methods in `Controller` class which is **responsible for returning the view or json data**. Action will mainly have return type — `ActionResult` and it will be invoked from method  `InvokeAction()` called by controller.

Question 9

What is _Razor View Engine_?

Accepted Answer

**Razor** is the first major update to render HTML in MVC 3. Razor was designed specifically for view engine syntax. Main focus of this would be to simplify and code-focused templating for HTML generation. Below is the sample of using Razor: ```html @model MvcMusicStore.Models.Customer @{ViewBag.Title = “Get Customers”;}

@Model.CustomerName

```

Question 10

What are _Scaffold templates_ in MVC?

Accepted Answer

**Scaffold** templates are used to generate code for basic CRUD operations within your ASP.NET MVC applications against your database with the help Entity Framework.

Microsoft provides a helpful scaffolding engine, powered by T4 templates, that automates creating basic CRUD controllers and views for models in ASP.NET MVC applications that use the Entity Framework. (There are also WebAPI and MVC without Entity Framework scaffolders currently available.)

Top 38 ASP.NET MVC Interview Questions

What is ASP.NET MVC?

What is Layout in MVC?

What are the advantages of MVC over ASP.NET?

What is the use of `ViewModel` in MVC?

Explain Sections is MVC?

What are `NonAction` methods in MVC?

What are Scaffold templates in MVC?

What is Razor View Engine?

What you mean by Routing in MVC?

Explain `Bundle.Config` in MVC?

Can you explain Model, Controller and View in MVC?

What are Actions in MVC?

What is Razor Pages?

What is Attribute Routing in MVC?

Explain the difference between MVC vs ASP.NET Web API

What is `PartialView` in MVC?

Can a view be shared across multiple controllers? If Yes, How we can do that?

What about MVC in .NET Core?

Can you explain the page life cycle of MVC?

Can you explain `RenderBody` and `RenderPage` in MVC?

In OOP, what is the difference between the Repository Pattern and a Service Layer?

Explain the methods used to render the views in MVC?

What is the `HelperPage.IsAjax` Property?

What is the difference between `ViewBag` and `ViewData` in MVC?

What are some of the advantages of using ASP.NET MVC vs Web Forms?

What is the difference between `ViewResult()` and `ActionResult()` in ASP.NET MVC?

Explain ASP.NET WebAPI vs MVC

What are HTML Helpers in MVC?

Describe Flux vs MVC?

What is the difference between `ViewData` and `TempData`?

Is it possible to create web application with both WebForms and MVC?

Explain Dependency Resolution in MVC?

What are AJAX Helpers in MVC?

Why to use `Html.Partial` in MVC?

What is Separation of Concerns in ASP.NET MVC?

What are Validation Annotations?

How route table has been created in ASP.NET MVC?

What is the difference between `Html.Partial` vs `Html.RenderPartial` & `Html.Action` vs `Html.RenderAction`?

Top 38 ASP.NET MVC Interview Questions

What is ASP.NET MVC?

What is Layout in MVC?

What are the advantages of MVC over ASP.NET?

What is the use of ViewModel in MVC?

Explain Sections is MVC?

What are NonAction methods in MVC?

What are Scaffold templates in MVC?

What is Razor View Engine?

What you mean by Routing in MVC?

Explain Bundle.Config in MVC?

Can you explain Model, Controller and View in MVC?

What are Actions in MVC?

What is Razor Pages?

What is Attribute Routing in MVC?

Explain the difference between MVC vs ASP.NET Web API

What is PartialView in MVC?

Can a view be shared across multiple controllers? If Yes, How we can do that?

What about MVC in .NET Core?

Can you explain the page life cycle of MVC?

Can you explain RenderBody and RenderPage in MVC?

In OOP, what is the difference between the Repository Pattern and a Service Layer?

Explain the methods used to render the views in MVC?

What is the HelperPage.IsAjax Property?

What is the difference between ViewBag and ViewData in MVC?

What are some of the advantages of using ASP.NET MVC vs Web Forms?

What is the difference between ViewResult() and ActionResult() in ASP.NET MVC?

Explain ASP.NET WebAPI vs MVC

What are HTML Helpers in MVC?

Describe Flux vs MVC?

What is the difference between ViewData and TempData?

Is it possible to create web application with both WebForms and MVC?

Explain Dependency Resolution in MVC?

What are AJAX Helpers in MVC?

Why to use Html.Partial in MVC?

What is Separation of Concerns in ASP.NET MVC?

What are Validation Annotations?

How route table has been created in ASP.NET MVC?

What is the difference between Html.Partial vs Html.RenderPartial & Html.Action vs Html.RenderAction?

What is the use of `ViewModel` in MVC?

What are `NonAction` methods in MVC?

Explain `Bundle.Config` in MVC?

What is `PartialView` in MVC?

Can you explain `RenderBody` and `RenderPage` in MVC?

What is the `HelperPage.IsAjax` Property?

What is the difference between `ViewBag` and `ViewData` in MVC?

What is the difference between `ViewResult()` and `ActionResult()` in ASP.NET MVC?

What is the difference between `ViewData` and `TempData`?

Why to use `Html.Partial` in MVC?

What is the difference between `Html.Partial` vs `Html.RenderPartial` & `Html.Action` vs `Html.RenderAction`?