MVC interview — Set 3
1. Explain Model, View, and Controller in Brief Model: Represents the data and the business logic of the application. It interacts with the database, retrieves, and stores information. View: Responsible for displaying the data provided by the model. It represents the user interface of the application. Controller: Handles user input and interaction. It processes incoming requests, performs operations on the model, and returns the appropriate view. 2. What are the Different Return Types Used by the Controller Action Method in MVC? ViewResult: Returns a view. PartialViewResult: Returns a partial view. JsonResult: Returns JSON data. RedirectResult: Redirects to a different URL. RedirectToRouteResult: Redirects to a specific route. ContentResult: Returns raw content (string). FileResult: Returns a file download. EmptyResult: Represents no result (no response). 3. Name the Assembly in which the MVC Framework is Typically Defined The MVC framework is typically defined in the System.Web.Mvc assembly. 4. Explain the MVC Application Life Cycle Application Start: The application starts, and configuration settings are loaded. Routing: Incoming requests are matched against defined routes to determine the controller and action. Controller Initialization: The controller that matches the route is instantiated. Action Execution: The controller action method is executed. Result Execution: The result of the action (usually a view) is rendered. Response: The rendered HTML or other output is sent back to the client. 5. What are the Various Steps to Create the Request Object? Filling Route Data: Matches the URL with the routes defined in RouteConfig.cs. Request Context Creation: Forms a request context using the matched route data. Controller Creation: Instantiates the controller using the request context. 6. Explain Some Benefits of Using MVC Separation of Concerns: Different aspects of the application (input logic, business logic, and UI) are separated into different components. Testability: Each component can be tested independently, improving testability. Scalability: Applications are easier to scale due to the modular nature. Flexibility: MVC architecture makes it easier to implement new technologies or patterns. 7. Explain in Brief the Role of Different MVC Components Model: Manages the application data and enforces business rules. View: Displays data from the model and sends user input to the controller. Controller: Handles user input, updates the model, and selects the view to display. 8. How Will You Maintain the Sessions in MVC? Sessions in MVC can be maintained using: Session object: Stores data using key-value pairs. Cookies: Store session data on the client side. Query strings or hidden fields. 9. What Do You Mean by Partial View of MVC? A partial view is a reusable component that renders a portion of a view. It does not have a complete HTML structure (e.g., no <html> or <body> tags) and is used to encapsulate reusable content. 10. Explain in Brief the Difference Between Adding Routes in a WebForm Application & an MVC Application? WebForm Application: Routes are defined using RouteTable in the Global.asax.cs file. MVC Application: Routes are typically defined in the RouteConfig.cs file within the App_Start folder, using the RouteCollection.MapRoute() method. 11. How Will You Define the 3 Logical Layers of MVC? Presentation Layer: Includes the views that are responsible for the UI. Business Logic Layer: Includes controllers that handle user input and business logic. Data Access Layer: Includes models that interact with the database. 12. What is the Use of ActionFilters in MVC? Action filters are used to implement logic that should be executed before or after an action method runs. Examples include authentication checks, logging, or error handling. 13. How to Execute Any MVC Project? Explain its Steps. Step 1: Open the MVC project in Visual Studio. Step 2: Set the desired project as the startup project. Step 3: Build the project using Ctrl + Shift + B. Step 4: Run the project by pressing F5 (debug mode) or Ctrl + F5 (without debugging). 14. What is the Concept of Routing in MVC? Routing is a pattern-matching system that maps incoming requests to specific controller actions. It uses route templates defined in the application to determine how URLs are processed. 15. What are the 3 Important Segments for Routing? Controller: Specifies which controller to use. Action: Specifies which action method to invoke. Parameters: Any additional values required by the action method. 16. What are the Different Properties of MVC Routes? Name: The name of the route. URL Pattern: The URL format associated with the route. Defaults: Default values for segments that are optional. Constraints: Restrict the values that segments can accept. 17. How is the Routing Carried Out in MVC? When a request is received, the routing engine matches the URL against defined routes. If a match is found, it routes the request to the corresponding controller and action method. 18. How Will You Navigate from One View to Another View in MVC? Explain with a Hyperlink Example. You can use the Html.ActionLink helper to navigate between views. 1 @Html.ActionLink("Go to About Page", "About", "Home") This creates a hyperlink that navigates to the About action of the Home controller. 19. Explain the 3 Concepts in One Line; TempData, View, and ViewBag? TempData: Temporary data storage, persists across requests. View: The user interface component that displays data. ViewBag: Dynamic object for passing data from controller to view within a single request. 20. Mention & Explain the Different Approaches You Will Use to Implement Ajax in MVC? Using jQuery: Send AJAX requests with jQuery’s $.ajax() method. Using AJAX Helpers: Utilize built-in MVC AJAX helper methods like Ajax.BeginForm(). Using Fetch API: Use the modern JavaScript Fetch API for making AJAX requests. 21. How Will You Differentiate Between ActionResult and ViewResult? ActionResult: A base class for all action results, allows returning different types of results (e.g., ViewResult, JsonResult). ViewResult: A derived class of ActionResult that specifically returns a view. 22. What is Spring MVC? Spring MVC is a Java-based framework used to build web applications. It follows the MVC design pattern and is part of the larger Spring Framework ecosystem. 23. Explain Briefly What You Understand by Separation of Concern. Separation of Concern means dividing an application into distinct sections, each handling a specific aspect of functionality, reducing interdependencies and making it easier to manage, develop, and test. 24. What is TempData in MVC? TempData is used to store temporary data that needs to be available across multiple requests, such as data used during a redirect. 25. Define Output Caching in MVC. Output caching stores the content generated by the controller action, so subsequent requests for the same content can be served quickly from the cache without re-processing. 26. Why are Minification and Bundling Introduced in MVC? Minification reduces the size of JavaScript and CSS files by removing unnecessary characters. Bundling combines multiple files into one. Both improve performance by reducing the number and size of requests. 27. Describe ASP.NET MVC. ASP.NET MVC is a framework for building scalable, standards-based web applications using the MVC design pattern, focusing on separation of concerns and providing a testable architecture. 28. Which Class Will You Use for Sending the Result Back in JSON Format in MVC? The JsonResult class is used to send a JSON-formatted response back to the client. 29. Make a Differentiation Between View and Partial View? View: Represents a complete HTML page. Includes layout and full HTML structure. Partial View: Represents a segment of the page. Used for reusable components and does not include layout. 30. Define the Concept of Filters in MVC? Filters allow executing code before or after specific stages in the request processing pipeline, such as authorization checks, error handling, or logging. 31. **Mention the Significance of NonAction Attribute?** ...
