Asp Net Core Mvc Interview Questions

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Asp Net Core Mvc Interview Questions

Asp.Net Core MVC Interview Questions

Asp Net Core Mvc Interview Questions

ASP.NET Core MVC is an open-source web framework used to build modern, high-performance, and cross-platform web applications. It follows the Model-View-Controller architectural pattern, separating the application logic, presentation, and data into different components. Asp Net Core Mvc interview questions focus on testing the candidate's knowledge and understanding of different aspects of this framework, such as routing, model binding, filters, middleware, dependency injection, Razor syntax, and integration with client-side frameworks. Some common questions include the difference between ASP.NET Core MVC and ASP.NET MVC, the use of Tag Helpers, how to implement authentication and authorization, and deployment strategies. Employers look for candidates who are proficient in developing scalable and secure web applications using ASP.NET Core MVC and can effectively troubleshoot issues and optimize performance.

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1 - What is ASP.NET Core MVC?

ASP.NET Core MVC is an open source web application framework developed by Microsoft for building modern and cloud based applications. It is a part of the ASP.NET Core framework and is used for building web applications and APIs using the Model View Controller architectural pattern.

2) What are the main components of ASP.NET Core MVC?

The main components of ASP.NET Core MVC are the Model, View, and Controller. The Model represents the data and business logic of the application, the View represents the presentation layer, and the Controller acts as a mediator between the Model and View.

3) What are the advantages of using ASP.NET Core MVC?

Some advantages of using ASP.NET Core MVC are:

  It is cross platform, meaning it can run on Windows, Linux, and macOS.

  It has a lightweight and modular architecture.

  It supports modern web development practices such as server side rendering, web sockets, and SPA applications.

  It has built in support for dependency injection.

  It provides better performance compared to its predecessor, ASP.NET MVC.

4) What is the difference between ASP.NET Core MVC and ASP.NET MVC?

The main difference between ASP.NET Core MVC and ASP.NET MVC is their dependency on the .NET framework. ASP.NET Core MVC is built using .NET Core, which is a lightweight and cross platform framework, while ASP.NET MVC is built using the full .NET framework, which is Windows specific.

5) How does routing work in ASP.NET Core MVC?

Routing in ASP.NET Core MVC maps incoming requests to a specific controller action method based on the defined routes in the application's Startup class. The routing system uses attributes, conventions, or a combination of both to define the routes.

6) What is the difference between ViewData, ViewBag, and TempData?

ViewData, ViewBag, and TempData are used for passing data from a controller to a view in ASP.NET Core MVC. The main difference between them is their lifespan. ViewData and ViewBag can only be used for passing data during the current request, while TempData can pass data between multiple requests until it is read.

7) What is the use of Razor Pages in ASP.NET Core MVC?

Razor Pages is a new feature introduced in ASP.NET Core that simplifies the development of page focused applications. It combines the Model, View, and Controller into a single Page model, making it easier to build and maintain web applications.

8) What are Tag Helpers in ASP.NET Core MVC?

Tag Helpers are a new feature in ASP.NET Core MVC that allows developers to create HTML like tags that can invoke server side C# code, making the code in views cleaner and easier to read. It is an alternative to the traditional way of writing server side code in views using Razor syntax.

9) How does authentication and authorization work in ASP.NET Core MVC?

Authentication is the process of identifying the users of an application, while authorization is the process of granting access to specific resources or actions based on the authenticated user's permissions. In ASP.NET Core MVC, authentication and authorization are handled using middleware, which can be configured in the application's Startup class.

10) What is the use of the appsettings.json file in ASP.NET Core MVC?

The appsettings.json file in ASP.NET Core MVC is used to store application settings such as environment specific configuration, logging settings, and database connection strings. It allows developers to easily manage and change application settings without having to recompile the application.

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11) What is the use of dependency injection in ASP.NET Core MVC?

Dependency injection (DI) is a design pattern used in ASP.NET Core MVC to decouple the various components of an application and make them more reusable and testable. With DI, dependencies are injected into a class rather than being instantiated within the class, making it easier to switch out implementations and write unit tests.

12) How do you handle errors in ASP.NET Core MVC?

In ASP.NET Core MVC, errors are handled using middleware. The UseExceptionHandler() method in the application's Startup class can be used to configure a centralized place for handling exceptions. Additionally, developers can also use the HandleError attribute on controller actions to handle errors.

13) What is the use of ASP.NET Core Identity in ASP.NET Core MVC?

ASP.NET Core Identity is a membership system that provides user authentication and authorization features for ASP.NET Core applications. It includes features such as user management, authentication, role based authorization, and external authentication providers.

14) What is the difference between asynchronous and synchronous programming in ASP.NET Core MVC?

In synchronous programming, a request is processed one at a time, and the thread waiting for the response is blocked. In asynchronous programming, requests can be processed concurrently, and the thread handling the request can be freed up to handle other requests while waiting for a response. This results in better scalability and performance in asynchronous programming.

15) How do you implement caching in ASP.NET Core MVC?

Caching in ASP.NET Core MVC can be implemented using the built in MemoryCache or DistributedCache. Developers can also use third party caching libraries such as Redis or Memcached. Caching can help improve application performance by reducing the number of calls made to the database or external services.

16) What is middleware in ASP.NET Core MVC?

Middleware is a software component that runs between the application's request and response. In ASP.NET Core MVC, middleware performs various tasks such as logging, error handling, and authentication. The middleware pipeline can be configured in the application's Startup class.

17) What is the use of IActionResult in ASP.NET Core MVC?

IActionResult is an interface in ASP.NET Core MVC that represents an HTTP response. It provides the flexibility to return different types of responses such as a View, JSON data, a redirect result, or a status code. This allows for better decoupling between the controller and the view.

18) How do you deploy an ASP.NET Core MVC application?

An ASP.NET Core MVC application can be deployed using various methods such as publishing to a web server or a cloud platform like Azure, Docker containers, or through IIS. The deployment process can be automated using build tools like MSBuild or continuous integration using tools like Azure DevOps.

19) What is the use of the IActionResult interface?

IActionResult is an interface in ASP.NET Core MVC that represents a result of an action method. It allows developers to return different types of responses such as a View, JSON data, a redirect result, or a status code.

20) What is Model Binding in ASP.NET Core MVC?

Model Binding is a feature in ASP.NET Core MVC that maps the data submitted in an HTTP request to a C# object. It allows developers to retrieve form data, query string values, and route values and bind them to action method parameters automatically.

21) How do you handle concurrency conflicts in ASP.NET Core MVC?

Concurrency conflicts can occur when multiple users are trying to access and modify the same data at the same time. In ASP.NET Core MVC, concurrency conflicts can be handled by using optimistic concurrency, where a version number or timestamp is used to track changes and detect conflicts.

22) What is the use of HTML Helpers in ASP.NET Core MVC?

HTML Helpers are methods in ASP.NET Core MVC that help generate HTML elements such as forms, links, and inputs in a view. They simplify the process of writing HTML code in views and provide type safety and intellisense support.

23) How do you implement internationalization and localization in ASP.NET Core MVC?

Internationalization refers to the process of building applications that can support different languages and cultures, while localization refers to the process of translating an application into specific languages. ASP.NET Core MVC provides built in support for resource files and the IStringLocalizer interface to handle internationalization and localization in applications.

24) How do you implement client side validation in ASP.NET Core MVC?

Client side validation is used to validate user inputs on the client side before sending them to the server. In ASP.NET Core MVC, client side validation can be implemented using the jQuery Validate plugin or the ASP.NET Core Tag Helpers. This reduces the number of round trips to the server and improves user experience.

25) What are filters in ASP.NET Core MVC?

Filters are a feature in ASP.NET Core MVC that allow developers to execute code before or after an action method is executed. There are several types of filters, including authorization filters, exception filters, and result filters, which provide different behaviors and can be applied at the action, controller, or global level.

 

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