How do Razor tag helpers differ from HTML helpers in ASP.NET Core?
- They are written in C#
- They use HTML-like syntax
- They are used for validation
- They are not used for forms
Razor tag helpers in ASP.NET Core use HTML-like syntax, making them more natural and readable in Razor views. HTML helpers typically involve writing C# code within the view, which can be less intuitive for front-end developers.
You're a beginner and want to start developing ASP.NET Core apps. Which IDE developed by Microsoft would you most likely start with for a comprehensive development experience?
- Visual Studio
- Visual Studio Code
- Eclipse
- IntelliJ IDEA
As a beginner, for a comprehensive ASP.NET Core development experience, you would typically start with Microsoft's Visual Studio. Visual Studio provides a rich and integrated development environment specifically tailored for ASP.NET Core development, making it an excellent choice for newcomers.
You are tasked to catch all unhandled exceptions globally in your ASP.NET Core MVC application. Which approach would be most suitable to achieve this?
- Use the try...catch block in every action method.
- Configure global exception handling in the Startup.cs file using app.UseExceptionHandler("/Home/Error").
- Implement a custom exception filter for each controller.
- Set MvcOptions.Filters.Add(new GlobalExceptionFilter()) in the Startup.cs file.
To catch all unhandled exceptions globally in an ASP.NET Core MVC application, you should configure global exception handling in the Startup.cs file using app.UseExceptionHandler("/Home/Error"). This route will handle unhandled exceptions and direct them to a specified error page.
In integration testing for an ASP.NET Core application, what is typically mocked to ensure tests don't affect real data?
- Database
- HTTP Requests
- File System
- Authentication
In integration testing, it's common to mock HTTP requests. This ensures that the tests don't interact with the real database or external services, preventing unintended side effects on actual data during testing.
How can you enforce a strict null check in Razor views to catch potential null reference issues at compile-time?
- Use the @ operator
- Add @Nullable attribute to variables
- Use the "as" keyword
- Enable nullable reference types with #nullable directive
To enforce strict null checking in Razor views, you can enable nullable reference types by using the "#nullable" directive at the top of your Razor file. This allows the compiler to detect potential null reference issues at compile-time, reducing runtime errors.
While working on an ASP.NET Core project, you notice that all Razor views seem to have access to the same set of using directives and shared code. Which file is likely responsible for this behavior?
- _ViewImports.cshtml
- _Layout.cshtml
- _ViewStart.cshtml
- web.config
The _ViewImports.cshtml file is responsible for defining common using directives and shared code that are automatically available to all Razor views in an ASP.NET Core project. It centralizes the configuration for views, promoting code reuse and consistency.
In which file format is the ASP.NET Core project definition primarily saved?
- .xml
- .json
- .yaml
- .html
The ASP.NET Core project definition is primarily saved in a .json (JavaScript Object Notation) file format. This JSON file, often named "project.json" or "*.csproj," contains essential project configuration information, dependencies, and build settings. It's used by the build system to compile and manage the project.
For developers using Visual Studio, the _________ window provides a REPL environment for C# scripting.
- Output
- Console
- Debug
- Immediate
In Visual Studio, the Immediate window is a powerful tool for developers. It allows them to execute C# code directly during debugging sessions. It's particularly useful for evaluating expressions, testing code snippets, and understanding program behavior in real-time. Developers can use the Immediate window to interactively work with their code and variables.
The _______ property of the route attribute can be used to name a route, making it easier to generate URLs for it later.
- RouteName
- RouteOrder
- RouteAlias
- RouteTag
The RouteName property of the route attribute allows developers to name a route explicitly. Naming routes is especially useful when generating URLs later in the application, as it provides a more robust and maintainable way to refer to routes.
When defining an attribute route, which of the following attributes would you use to specify a route for an action method?
- [Route]
- [Action]
- [Controller]
- [HttpGet]
To specify a route for an action method using attribute routing in ASP.NET Core, you would use the [Route] attribute. This attribute allows you to define the URL pattern that maps to the action method, giving you fine-grained control over routing behavior.