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Interview questions related to NET MVC
1.1.
Beginner Level Interview Question for NET MVC
1.2.
Intermediate Level Interview Question for NET MVC
1.3.
Advance Level Interview Question for NET MVC
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Conclusion
Last Updated: Mar 27, 2024

Interview Questions for NET MVC

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This article will discuss some of the most common NET MVC interview questions. NET MVC is a popular web development framework that allows developers to build dynamic and interactive web applications. If you're a .NET developer, you must be prepared for the interview questions you may be asked during the hiring process. In this article, we will cover a range of topics, including the basics of .NET MVC, the various components of the framework, and some of the best practices for developing applications using .NET MVC. 

Interview Questions for NET MVC

 

Let's get started with NET MVC Interview Questions!

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Interview questions related to NET MVC

Here, you can discover the Most Commonly Asked NET MVC Interview Questions and boost your chances of acing your following technical interview. 

Beginner Level Interview Question for NET MVC

Here we will discuss beginner level NET MVC interview questions.

 

1. What is .NET MVC?

.NET MVC is a web application framework developed by Microsoft that enables developers to build dynamic and interactive web applications using a Model-View-Controller (MVC) architectural pattern. It allows for separating concerns and provides a structured approach to building web applications.

 

2. What are the benefits of using .NET MVC?
The benefits of using .NET MVC include separation of concerns, testability, extensibility, and the ability to build highly scalable and performant web applications. Additionally, .NET MVC provides built-in security features and supports various third-party tools and libraries.
 

3. What is the difference between ASP.NET Web Forms and .NET MVC?
ASP.NET Web Forms is a web application framework that uses a traditional event-driven model, whereas .NET MVC is based on the Model-View-Controller pattern. Web Forms is generally used for building small to medium-sized web applications, while .NET MVC is suitable for building large and complex web applications.
 

4. What is a controller in .NET MVC?
In .NET MVC, a controller is responsible for processing incoming requests and returning responses to the client. Controllers contain action methods that handle specific requests and return results to the view.
 

5. What is a view in .NET MVC?
In .NET MVC, a view is responsible for rendering the user interface of a web application. Views receive data from the controller to generate HTML sent back to the client.
 

6. What is a model in .NET MVC?
In .NET MVC, a model represents a web application's data and business logic. Models are used to store and retrieve data from the database and to perform data validation.
 

7. What is routing in .NET MVC?
Routing in .NET MVC is the process of matching a URL to a specific controller action. It enables developers to define custom URLs for their web applications and provides a clean and understandable URL structure for end-users.
 

8. What is the Razor view engine in .NET MVC?
The Razor view engine is a view engine used in .NET MVC that allows developers to write HTML markup using C# or Visual Basic code. Razor provides a lightweight syntax that is easy to read and write, making it a popular choice among .NET developers.
 

9. What is an action filter in .NET MVC?
An action filter is a custom attribute that can be applied to a controller action or the controller itself to perform some pre or post-processing tasks. Action filters can be used for tasks such as authentication, caching, logging, and error handling.
 

10. What is Scaffolding in .NET MVC?
Scaffolding in .NET MVC is a code generation tool that allows developers to create a basic implementation of a web application using pre-built templates. It can generate controller, view, and model code based on the database schema, making it a quick and easy way to get started with .NET MVC.

Intermediate Level Interview Question for NET MVC

Here, we will discuss intermediate level net mvc interview questions.

 

11. What is the difference between TempData and ViewBag in .NET MVC?
TempData is used to pass data between controller actions and is useful when redirecting from one activity to another. The data stored in TempData persists for only one request, after which it is deleted. ViewBag is used to pass data from a controller action to a view and can be used to generate content dynamically in the view.

 

12. What is the difference between @Html.Partial and @Html.RenderPartial in .NET MVC?

The difference between @Html.Partial and @Html.RenderPartial in .NET MVC are

Feature @Html.Partial @Html.RenderPartial
Method signature @Html.Partial(string partialViewName) @Html.RenderPartial(string partialViewName)
Rendering behavior Renders the partial view as a string and includes it in the parent view Renders the partial view directly to the output stream
Return value Returns a string Returns void
Reusability The returned string can be assigned to a variable and reused multiple times Cannot be reused as it directly writes to the output stream
Performance Slightly slower due to the additional overhead of returning a string Slightly faster as it writes directly to the output stream
Usage Used when the partial view is being included multiple times within a parent view or when the content of the partial view is needed to be manipulated before rendering Used when the partial view is being included once within a parent view and the content of the partial view is not needed to be manipulated

 

13. What is the use of TempData in .NET MVC?
TempData is used to store data between two consecutive requests. It is helpful for scenarios such as passing data between an HTTP GET and an HTTP POST request or between a controller action and a subsequent redirect.
 

14. What is the difference between HtmlHelper and UrlHelper in .NET MVC?
The difference between HtmlHelper and UrlHelper in .NET MVC are

Criteria HtmlHelper UrlHelper
Purpose Helps to render HTML controls and UI elements on a web page Helps to generate URLs for different actions in a web application
Example Html.TextBoxFor(), Html.DropDownListFor(), Html.LabelFor() Url.Action(), Url.Content(), Url.RouteUrl()
Parameters Takes a lambda expression that specifies the model property to render Takes an action name, controller name, and route values as parameters
Returns Renders HTML controls and UI elements on a web page Returns a URL string
Use in Views Used to create form fields, labels, and other UI elements Used to generate links and URLs for navigation and redirection
Use in Controllers Can be used to render views and generate HTML output for responses Can be used to generate URLs for redirection or in response objects
Dependency Depends on the System.Web.Mvc.Html namespace Depends on the System.Web.Mvc namespace

 

15. What is the role of a model binder in .NET MVC?

In .NET MVC, a model binder is responsible for mapping data from HTTP request data (e.g. query string, form data, and HTTP headers) to the parameters of an action method in a controller. When a user submits a request to an MVC application, the MVC framework analyzes the request to determine which controller and action method should handle it. Once the appropriate action method has been identified, the framework needs to provide values for the method's parameters. This is where the model binder comes in. 

The model binder uses the parameter's name and type to determine which values to extract from the request data. It then attempts to convert these values to the appropriate data types before passing them to the action method. If the conversion is not possible, it generates a validation error.
 

16. What is the use of ModelState.IsValid in .NET MVC?

The use of ModelState.IsValid in .NET MVC are

  • In .NET MVC, the ModelState object is used to track the validation status of a model, which represents the user input in a form or other UI element.
  • ModelState.IsValid is a property of the ModelState object that returns a Boolean value indicating whether the model state is valid or not.
  • It is commonly used in controller actions to check if the model state is valid before proceeding with any further processing or action.
  • When a user submits a form, the server-side code in the controller action typically verifies the model data. If the validation fails, the ModelState object is updated with an error message for each validation error. If the validation succeeds, the ModelState object is considered valid.
  • The ModelState.IsValid property can be used in controller actions to check if the validation has succeeded or failed. If the property returns true, it means that the model data passed validation and the action can proceed with further processing or action. 

 

17. What is the difference between AJAX and jQuery in .NET MVC?

AJAX is a technique used to update parts of a web page without refreshing the entire page. It uses JavaScript and XML to send and receive data asynchronously from the server. jQuery is a JavaScript library that simplifies the process of writing JavaScript code and provides a range of utilities for working with the DOM and making AJAX requests.
 

18. What is the use of the Web.config file in .NET MVC?
The Web.config file is used to configure the settings of a .NET MVC application. It contains settings for the database connection, authentication and authorization, session management, and other application-specific settings.
 

19. Why is WebAPI technology introduced?
Web APIs, or Application Programming Interfaces, were introduced to enable web applications to interact with each other and with other systems, such as databases or third-party services. They allow developers to integrate functionality from different sources into their own applications without building everything from scratch.

Before the introduction of Web APIs, the main way for web applications to communicate with each other was through screen scraping, which involved parsing HTML pages to extract the information needed. This approach was brittle and often required a lot of manual intervention to maintain.

With the advent of Web APIs, developers can access structured data in a standardized way, using HTTP requests and responses that can be easily understood and processed by machines. This has opened up new possibilities for creating dynamic and powerful web applications that can access and manipulate data from multiple sources.
 

20. What is the difference between asynchronous and synchronous actions in .NET MVC?
Synchronous actions are executed one at a time in the order they are received by the server, while asynchronous actions can execute multiple requests simultaneously, improving the overall performance of the web application. Asynchronous actions are useful for long-running operations, such as database queries or API calls.

Advance Level Interview Question for NET MVC

Here, we will discuss advanced level net mvc interview questions.

21. Discuss the vital namespaces used in ASP.NET MVC.
In ASP.NET MVC, a namespace is a way to group related classes and provide a unique identity to each of them. Namespaces are used to avoid naming conflicts and provide a way to organize classes, interfaces, and other types of objects within an application. 

Some of the vital namespaces used in ASP.NET MVC are:

  1. System.Web.Mvc
    This namespace contains the core classes used to build ASP.NET MVC applications. It includes classes for handling requests and responses, routing, filters, controllers, views, and model binding.
     
  2. System.Web.Routing
    This namespace contains classes that are used to define URL routing rules. It provides a way to map incoming URLs to controller actions and specify parameters passed to those actions.
     
  3. System.ComponentModel.DataAnnotations
    This namespace contains classes used to define data validation rules for model properties. It includes attributes like Required, Range, StringLength, and RegularExpression used to validate user input.
     
  4. System.Web.Helpers
    This namespace contains utility classes that simplify common web development tasks. It includes classes for generating URLs, encoding and decoding HTML, and creating charts and graphs.
     
  5. System.Linq
    This namespace contains classes used for working with collections of objects. It includes classes like Enumerable, Queryable, and Grouping that provide methods for filtering, sorting, and grouping data.
     
  6. System.Data.Entity
    This namespace contains classes that are used to work with databases using the Entity Framework. It includes classes for defining database models, executing queries, and performing database migrations.
     

Check out Entity Framework Interview Questions to know more about it.
 

22. What is the difference between a partial view and a view in .NET MVC?
The difference between a partial view and a view in .NET MVC are

Parameters Partial Views Views
Definition A reusable part of a view that can be embedded in other views. A complete page or a specific section of a page.
File Extension .cshtml (in Razor View Engine) or .aspx (in Web Forms View Engine) .cshtml (in Razor View Engine) or .aspx (in Web Forms View Engine)
Output Returns a chunk of HTML that can be embedded into other views. Returns a complete HTML page.
Model Binding Can have their own separate models, independent of the parent view. Bind with a single model of the view.
Rendering Rendered using Html.Partial or Html.RenderPartial method. Rendered using Html.RenderAction, Html.RenderPage, Html.RenderView, or View() method.
Usage Used to break down complex views into smaller, reusable components. Used to represent complete pages or specific sections of a page.

 

23. What are the main Razor Syntax Rules?
Razor is a syntax used in ASP.NET Core to create dynamic web pages with C# or Visual Basic .NET code. The main Razor syntax rules are:

  • Code blocks start with @ symbol 
    To include C# or VB.NET code in a Razor view, you need to enclose the code in a code block starting with the @ symbol.
     
  • Inline expressions
    You can include inline expressions using the @ symbol followed by parentheses containing the expression.
     
  • HTML markup 
    Razor views can include HTML markup, which is not enclosed in code blocks.
     
  • Conditional statements
    You can use if-else statements and switch statements in Razor views.
     
  • Loops
    Razor views support for loops, while loops, and do-while loops.

 

24. Define the three logical layers of the MVC Pattern.

The Model-View-Controller (MVC) pattern is a software architectural pattern that separates an application into three logical layers. These layers are:

  1. Model
    The model represents the application's data and business logic. It is responsible for managing the application's data and providing methods to access and manipulate that data. The model layer is independent of the user interface and can be reused in other applications.
     
  2. View
    The view is responsible for presenting the model's data to the user in a user-friendly way. It displays the data and responds to user input. The view layer is also responsible for collecting user input and passing it to the controller layer.
     
  3. Controller
    The controller is responsible for controlling the flow of data between the model and the view. It receives input from the view, interacts with the model, and updates the view as necessary. The controller layer acts as an intermediary between the model and the view, ensuring that they remain independent of each other.
     

25. How to execute validation in MVC?
In the Model-View-Controller (MVC) pattern, validation is typically performed in the model. Here are the general steps to execute validation in MVC:

  1. Define validation rules
    First, define the validation rules for your model. These rules may include required fields, data type constraints, length constraints, uniqueness constraints, and so on.
     
  2. Implement validation in the model
    Implement the validation logic in the model. This may involve using built-in validation functions or writing custom validation code.
     
  3. Invoke validation in the controller
    In the controller, you can invoke the validation logic when processing a user request. Typically, this involves validating user input against the defined validation rules.
     
  4. Handle validation errors
    If validation fails, the model will typically return an error message to the controller. The controller can then display this error message to the user or take other appropriate action.
     
  5. Repeat the process
    The validation process may need to be repeated for subsequent user requests, depending on the nature of the application.
     

 

26. What is the difference between an ActionResult and a ViewResult in .NET MVC?
The difference between an ActionResult and a ViewResult in .NET MVC are

Feature ActionResult ViewResult
Base class System.Web.Mvc.ActionResult System.Web.Mvc.ViewResult
Inherits from None (abstract class) ActionResult
Type of result Generic result type Result that returns a View
Can return Anything that derives from ActionResult A View or a partial view
Requires a view No (can be used for non-view actions) Yes
Usage Typically used for non-view actions, such as returning JSON or redirecting to another action Used specifically for returning a view to the client

 

27. What is Database first approach in MVC through Entity Framework?

The The Database First approach in the Model-View-Controller (MVC) architecture using Entity Framework involves generating the entity classes and the DbContext (database context) class from an existing database.

The basic steps for implementing the Database First approach in an MVC project using Entity Framework are as follows:

  1. Create a new MVC project.
  2. Add a new ADO.NET Entity Data Model to the project.
  3. Choose the "EF Designer from database" option and select the database you want to use.
  4. Entity Framework will then generate the entity classes and the DbContext class based on the database schema.
  5. You can then use these generated classes in your MVC controllers and views to perform CRUD (Create, Read, Update, Delete) operations on the database.
     

28. What is Forms Authentication?
Forms Authentication is a type of authentication mechanism used in ASP.NET MVC web applications. 

Features of form authentication are:

  • It allows users to log in to a web application using a username and password and maintains the authentication state across multiple requests.
     
  • When a user logs in, Forms Authentication generates an encrypted authentication ticket, which is stored in a cookie on the client side. 
     
  • This ticket contains information about the user, such as their username and any roles or permissions they have. On subsequent requests, the web application reads the authentication ticket from the cookie and uses it to identify the user and authorize their access to protected resources.
     
  • Forms Authentication can be configured to work with various data sources, including a SQL Server database or an Active Directory domain. It also supports features like role-based authorization, where access to certain resources is restricted to users with specific roles, and persistent authentication, where the authentication ticket remains valid even after the user closes their browser.

 

29. What are the steps to create the request object?
In the Model-View-Controller (MVC) design pattern, the Request object is typically created by the framework or library being used. However, here are the typical steps involved in creating a Request object in an MVC framework:

  1. User sends a request
    The user initiates an HTTP request by entering a URL or clicking on a link.
     
  2. Request reaches the web server
    The web server receives the request and sends it to the appropriate controller.
     
  3. Controller handles the request 
    The controller parses the request and extracts the necessary data from it, such as the URL, form data, or query parameters.
     
  4. Controller creates the Request object
    Based on the extracted data, the controller creates a Request object, which contains all the necessary information about the request, such as headers, cookies, and HTTP method.
     
  5. Controller processes the request
    The controller processes the request by calling the appropriate methods on the model and/or view objects.
     
  6. Response is generated
    The controller generates a response based on the model and/or view objects and sends it back to the user.


30. What are the different types of validators? 

In .NET MVC, various types of validators can be used to validate user input in web applications. These validators are as follows:

  • Required Validator: 
    This validator ensures that a user enters a value in a specific field.
     
  • Range Validator: This validator checks if the value entered by the user is within a specified range.
     
  • Regular Expression Validator: 
    This validator validates a value entered by the user against a specified regular expression pattern.
     
  • Compare Validator: 
    This validator compares the value entered in one field to another field to ensure they match.
     
  • Custom Validator: 
    This validator allows you to write your own validation logic to validate user input.
     
  • Email Validator: 
    This validator ensures that the value entered in a specific field is a valid email address.
     
  • Credit Card Validator: 
    This validator checks whether the credit card number entered by the user is valid or not.
     
  • Date Validator: 
    This validator ensures that the value entered by the user is a valid date.
     

These validators can be used individually or in combination to validate user input in a .NET MVC application.

Must Read Web Developer Interview Questions and  Operating System Interview Questions

Conclusion

In this blog, we have discussed the NET MVC Interview Questions. We have also discussed beginner level NET MVC Interview Questions, intermediate level NET MVC Interview Questions, and advanced-level NET MVC Interview Questions. We hope the blog has helped you enhance your NET MVC Interview Questions knowledge. You can also refer:

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