You are new to web development and you've heard about ASP.NET Core. What is the primary language used to code in this framework?
- C#
- Java
- Python
- Ruby
The primary language used for coding in ASP.NET Core is C#. While ASP.NET Core supports multiple languages, C# is the most commonly used language for building ASP.NET Core applications due to its strong integration with the framework and extensive tooling support.
You've created a new ASP.NET Core application with user registration. Now, you want to ensure that only registered users can post comments. Which attribute would you use to implement this restriction?
- [AllowAnonymous]
- [Authorize]
- [Authorize(Roles = "Admin")]
- [Authorize(Roles = "User")]
To restrict access to registered users only, you would use the [Authorize] attribute. This attribute can be applied at the controller or action level and ensures that only authenticated users can access the specified resources. It doesn't require specifying roles, as it already implies authenticated users. [AllowAnonymous] would allow both anonymous and registered users, while [Authorize(Roles = "Admin")] and [Authorize(Roles = "User")] are role-based authorizations and are not suitable for this scenario.
You've been reading about the MVC architecture and are trying to understand the components. If you wanted to add logic to fetch data from a database when a user visits a certain page, which component of MVC would handle this?
- Model
- View
- Controller
- Middleware
In the MVC (Model-View-Controller) architecture, the 'Model' component handles data-related logic, such as fetching data from a database. It represents the application's data and business logic. The 'Controller' handles user input and coordinates the flow of data between the 'Model' and 'View' components.
You are developing an e-commerce site where user's cart information needs to be preserved across sessions even if they log out. How can you achieve this in ASP.NET Core?
- Use browser cookies to store cart data
- Utilize Session state with server-side storage
- Store cart data in a client-side cookie
- Use local storage in JavaScript
To preserve the user's cart information across sessions, even after they log out, you should utilize Session state with server-side storage. This allows the cart data to be stored on the server, making it persistent across user sessions.
How did project.json handle transitive dependencies differently than the NuGet approach in previous ASP.NET versions?
- Implicitly
- Explicitly
- No Transitive Dependencies
- Manually
Project.json handled transitive dependencies explicitly, meaning it included both direct and transitive dependencies in the project file. In contrast, the NuGet approach in previous ASP.NET versions handled transitive dependencies implicitly, which required developers to manage them manually. Project.json's explicit handling improved transparency and control over dependencies.
How can you handle optimistic concurrency in Entity Framework Core?
- Use database locks
- Use pessimistic concurrency
- Use timestamps or row version columns
- Manually update records
Optimistic concurrency in EF Core is typically handled by using timestamps or row version columns in the database. When two users try to update the same record concurrently, EF Core checks if the row version has changed since the data was initially loaded, and if so, it raises a concurrency exception, allowing you to handle the conflict.
You're reviewing a colleague's code and notice that they've added the same namespace to multiple Razor views. How can you suggest an optimization to this approach?
- Leave it as is, it's the standard practice
- Suggest moving the namespace declaration to the _Layout.cshtml file
- Suggest moving the namespace declaration to the _ViewImports.cshtml file
- Remove the namespace declaration altogether
The optimization suggestion would be to move the common namespace declaration to the _ViewImports.cshtml file. This way, it's defined once and is available for all views, reducing redundancy and making it easier to manage.
In SignalR, which transport method does it fall back to if WebSockets are not available?
- Server-Sent Events (SSE)
- Long Polling
- WebRTC
- gRPC
SignalR is a real-time framework for ASP.NET Core that supports various transport methods. When WebSockets are not available due to network restrictions or browser compatibility, SignalR falls back to Long Polling. Long Polling involves sending a request to the server, keeping it open until new data is available, and then responding.
You've been asked to add a feature to your ASP.NET Core web application that allows live chat functionality. Which ASP.NET Core technology would help facilitate this feature?
- SignalR
- Entity Framework Core
- ASP.NET Web Forms
- Blazor
SignalR is a real-time web framework in ASP.NET Core that enables features like live chat. It allows bi-directional communication between the server and connected clients, making it ideal for building interactive and real-time applications. The other options are not related to live chat functionality.
Imagine you're working on an e-commerce application using ASP.NET Core MVC. A user wants to view details of a product. Which component of the MVC pattern would be responsible for fetching the product details from the database?
- Model
- View
- Controller
- Middleware
In the MVC (Model-View-Controller) pattern, the Model component is responsible for managing the application's data and business logic. In this scenario, it would be responsible for fetching the product details from the database. The Model interacts with the database and provides data to the Controller, which then passes it to the View for rendering.