Interview type questions - Forms and Validations in ASP.NET MVC

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ASP.NET MVC Interview Questions And Answers Part-4

Interview type questions- Forms and Validations in ASP.NET MVC

Q1. What are Data Annotations in ASP.NET MVC?

Data Annotations in ASP.NET MVC are attributes that you can apply to model properties to specify validation rules, customize the display name, and control the formatting of data.

Q2. How to apply Server-side validation in ASP.NET MVC?

To apply server-side validation in ASP.NET MVC, you can use Data Annotations on your model properties, and then in your controller, you can check the ModelState.IsValid property to determine if there are any validation errors.

Q3. How to determine there is no error in Model State? 

To determine if there are no errors in the Model State, you can check the ModelState.IsValid property in your controller. If it returns true, there are no errors.

Q4. How to enable and disable client-side validation in ASP.NET MVC?

To enable or disable client-side validation in ASP.NET MVC, you can use the HtmlHelper class's SetValidationEnabled method. Pass true to enable client-side validation and false to disable it.

Q5. What is a CDN and what advantages of CDN?

A CDN (Content Delivery Network) is a network of distributed servers that deliver web content, such as images, CSS files, and JavaScript files, to users based on their geographic locations. The advantages of using a CDN include improved website performance, reduced server load, and increased availability and scalability.

Q6. What is jquery.validate.unobtrusive.js?

jquery.validate.unobtrusive.js is a JavaScript file that is part of the jQuery Unobtrusive Validation library in ASP.NET MVC. It provides client-side validation functionality by using data annotations on model properties.

Q7. What is Bundling and Minification in ASP.NET MVC? 

Bundling and Minification in ASP.NET MVC are techniques used to improve the performance of a web application by reducing the number of HTTP requests and the size of static files, such as CSS and JavaScript files. Bundling combines multiple files into a single file, while minification reduces the size of these files by removing unnecessary characters and comments.

Q8. Can we use Bundling and Minification in ASP.NET MVC3 or ASP.NET4.0?

Yes, you can use Bundling and Minification in ASP.NET MVC3 or ASP.NET 4.0 by using the System.Web.Optimization library, which is available as a NuGet package.

Q9. How does Bundling use browser Cache capability?

Bundling uses the browser's cache capability by including a version number or hash in the bundled file's URL. When the contents of the file change, the URL changes, forcing the browser to download the new file. If the contents remain the same, the browser can use the cached version.

Q10. What is Partial View in ASP.NET MVC?

A Partial View in ASP.NET MVC is a reusable view that can be rendered within other views. It allows you to break complex views into smaller, more manageable parts.

Q11. How do you return a partial view from the controller?

To return a partial view from the controller, you can use the PartialView method and pass the name of the partial view as a parameter.

Q12. What are the different ways of rendering a Partial View in ASP.NET MVC?

There are several ways to render a Partial View in ASP.NET MVC, including using the Html.Partial method, Html.RenderPartial method, or using AJAX to load the partial view asynchronously.

Q13. What is Area in ASP.NET MVC?      

An Area in ASP.NET MVC is a way to organize a large web application into smaller, more manageable sections. Each area can contain its own controllers, views, and models.

Q14. How to register Area in ASP.NET MVC?

To register an Area in ASP.NET MVC, you need to create a class that inherits from AreaRegistration and override the RegisterArea method to define the routes for the area.

Q15. What is Child action and how to invoke it? 

A Child action in ASP.NET MVC is a method that is called from within a view to render a partial view or perform some other action. You can invoke a Child action using the Html.Action or Html.RenderAction methods in the view.

Q16. What is Scaffolding?

Scaffolding in ASP.NET MVC is a technique used to automatically generate code for basic CRUD (Create, Read, Update, Delete) operations for a model. It helps developers quickly create a basic user interface for managing data.

Q17. How do Scaffold templates work in ASP.NET MVC?

Scaffold templates in ASP.NET MVC are pre-defined templates used by the scaffolding engine to generate code for CRUD operations. Developers can customize these templates to suit their needs and generate custom code for their applications.

18. What are the main components of ASP.NET MVC?

Model: Represents the data and business logic of the application.

View: Represents the user interface (UI) of the application.

Controller: Handles user input, processes requests, and interacts with the model and view.

19. What is the difference between ASP.NET MVC and ASP.NET Web Forms?

ASP.NET MVC uses the Model-View-Controller pattern, which provides better separation of concerns and testability compared to ASP.NET WebForms.

ASP.NET MVC is more lightweight and gives developers more control over the HTML and JavaScript rendered to the client.

20. How do you pass data from a controller to a view in ASP.NET MVC?

Data can be passed from a controller to a view using the ViewBag, ViewData, or strongly typed models.

21. What is routing in ASP.NET MVC?

Routing is the process of mapping incoming requests to controller actions. It allows you to define friendly URLs for your application.

22. How do you handle form submissions in ASP.NET MVC?

Form submissions are handled by creating a POST action in a controller and using model binding to bind the form data to a model object.

23. What are action filters in ASP.NET MVC?

Action filters are attributes that can be applied to controller actions to add pre-action or post-action behavior, such as logging, caching, or authentication.

28. Explain what is routing in MVC. What are the three segments for routing important?

In MVC, the URL typically consists of three main segments:

Controller: The controller segment specifies which controller class should handle the request. For example, in a URL like https://www.mouthhunt.com/interviewtips, the interviewtips part indicates that the HomeController should handle the request.

Action: The action segment specifies which method or action within the controller should be invoked to handle the request. In the URL https://www.mouthhunt.com/interviewtips/asp.net-mvc-interview-questions, the asp.net-mvc-interview-questions part indicates that the action method of the HomeController should be called.

Parameters: The parameters segment allows passing additional data to the controller action. Parameters can be specified as key-value pairs in the URL. For example, in a URL like https://www.mouthhunt.com/interviewtips/asp.net-mvc-interview-questions, the asp.net-mvc-interview-questions is a parameter indicating that the product with ID asp.net-mvc-interview-questions should be displayed.

 

ASP.NET MVC Interview Questions And Answers Part-3


ASP.NET MVC Interview Questions And Answers Part-2


ASP.NET MVC Interview Questions And Answers Part-1



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