Which of the following best describes ASP.NET Core?
- A JavaScript framework for front-end web development
- A cross-platform, open-source framework for building modern, cloud-connected applications
- A framework for building desktop applications
- A proprietary framework exclusively for Windows application development
ASP.NET Core is best described as a cross-platform, open-source framework designed for building modern, cloud-connected applications. It is not limited to any specific operating system and allows developers to create web applications that can run on Windows, macOS, or Linux.
In the MVC pattern, the _________ is responsible for rendering the user interface of the application.
- Model
- View
- Controller
- Middleware
In the MVC (Model-View-Controller) pattern, the "View" is responsible for rendering the user interface of the application. Views are responsible for presenting data to the user in a format that is suitable for display, such as HTML templates or Razor pages.
You are developing an e-commerce application and want to handle exceptions such that any database-related exception shows a "Service temporarily unavailable" message to the user. How would you achieve this in ASP.NET Core?
- Using global exception handling middleware
- Catching exceptions in every database-related method
- Configuring the database to throw custom exceptions
- Using try-catch blocks in every database operation
In ASP.NET Core, you can achieve this by using global exception handling middleware. You can create a custom middleware that catches exceptions, checks if they are database-related, and then returns a "Service temporarily unavailable" response to the user. This approach centralizes exception handling and avoids the need for try-catch blocks in every database operation.
In the context of ASP.NET Core Web APIs, what does the [ApiController] attribute signify?
- It indicates that the controller is used for authentication.
- It specifies the controller's route parameters.
- It enables automatic model validation and response formatting.
- It denotes a controller for background tasks.
The [ApiController] attribute in ASP.NET Core Web APIs is used to enable automatic model validation and response formatting. When applied to a controller, it automatically validates incoming model data and serializes the response in a consistent format, typically JSON. This simplifies Web API development by reducing boilerplate code for validation and response formatting.
In Razor, how can you escape the "@" symbol if you need to display it as a literal in your view?
- Use double @ symbols, like "@@"
- Wrap it in double quotes, like "@"
- Prefix it with a backslash, like "@"
- Use HTML entity encoding, like "@"
To display the "@" symbol as a literal in a Razor view, you can use double "@" symbols, like "@@". This escapes the "@" symbol and ensures it's rendered as a plain "@" character in the generated HTML.
If there are conflicting directives between a Razor view and the _ViewImports.cshtml, which one takes precedence?
- Razor view directives
- _ViewImports.cshtml directives
- Both are considered equally
- The order in which they are declared
When there are conflicting directives between a Razor view and _ViewImports.cshtml, the directives in the Razor view take precedence. This means that the directives defined directly within the view itself will override any conflicting directives in the _ViewImports.cshtml file. This allows you to have fine-grained control over individual views.
Which tool among the following is primarily a command-line tool for .NET operations?
- Visual Studio Code
- Visual Studio
- Rider
- .NET CLI
The .NET CLI (Command-Line Interface) is a command-line tool provided by Microsoft for .NET operations. It allows developers to create, build, and manage .NET applications from the command line, making it a valuable tool for automation and scripting tasks.
After a recent deployment, users are facing issues with the login functionality. You suspect it might be due to a migration that wasn't applied correctly. How might you diagnose and rectify this issue?
- Revert to a previous backup of the database
- Run the "dotnet ef database update" command
- Examine the database schema and migration history
- Ignore the issue as it will resolve itself
To diagnose and rectify login functionality issues related to migrations, you should examine the database schema and migration history. Check if the expected changes have been applied by reviewing the migrations and comparing the schema with your model. This allows you to identify discrepancies and take appropriate corrective actions.
The method _________ in UserManager is used to sign in a user programmatically after the user has been created.
- 'SignInAsync'
- 'AuthenticateUser'
- 'LoginUser'
- 'AuthorizeUser'
To programmatically sign in a user after creating them, you can use the 'SignInAsync' method provided by the UserManager class in ASP.NET Core Identity. This method sets up the authentication cookies and establishes the user's identity for subsequent requests.
If you want to code for ASP.NET Core and prefer a lightweight, cross-platform editor, which tool would you likely use?
- Visual Studio
- Sublime Text
- Notepad
- Visual Studio Code
Visual Studio Code is a lightweight, cross-platform code editor that is highly popular among developers for ASP.NET Core development. It offers a wide range of extensions and support for various programming languages, making it an excellent choice for web development.