You are learning how to display data in a Razor view and came across @foreach. What is its primary purpose in the Razor view?
- Looping through a collection
- Defining CSS Styles
- Creating a JavaScript Function
- Declaring a Database Table
@foreach is used in Razor views to loop through a collection of items, typically provided by the model, and render HTML markup for each item. It's commonly used for displaying lists or tables of data in the view.
You are developing a news portal where general articles are available for all, but exclusive content should be accessed only by subscribers. How would you ensure this using the [Authorize] attribute?
- Use [Authorize] attribute with a policy that checks for the user's subscription status.
- Create separate controllers for general and exclusive content, applying [Authorize] to the latter.
- Set up a custom middleware to handle access control based on user roles.
- Implement a client-side authentication mechanism using JavaScript.
To restrict access to exclusive content, you can use the [Authorize] attribute with a policy that checks for the user's subscription status. This policy can be configured to allow access only to authenticated users with a valid subscription.
While browsing a website, a user clicks on a button to view their profile. In an ASP.NET Core MVC application, which component would decide what happens next?
- Controller
- View
- Model
- Database
In an ASP.NET Core MVC application, the Controller component would decide what happens next when a user clicks on a button. The Controller handles user requests and determines the appropriate action, which may involve interacting with the Model to retrieve or update data, and then selecting the appropriate View to render the response.
How does ASP.NET Core handle database schema changes if a migration is applied that changes an existing table's structure?
- It drops and recreates the table
- It updates the table in place
- It creates a new table and migrates data
- It throws an error
ASP.NET Core uses Entity Framework Core to manage database schema changes. When a migration is applied that changes an existing table's structure, it generates SQL commands to update the table in place, preserving existing data. Dropping and recreating the table would result in data loss. Creating a new table and migrating data is not the default behavior.
When creating a custom user registration view, which ASP.NET Core tag helper can be used to bind the input field to the model property?
- asp-for
- bind
- model
- form-control
The asp-for tag helper is used to bind an input field to a model property when creating custom user registration views in ASP.NET Core. It helps establish a connection between the HTML input element and the model property, ensuring proper data binding.
Which of the following is an essential property to set on the user object before calling the 'CreateAsync' method in ASP.NET Core Identity?
- FirstName
- IsAdmin
- PhoneNumber
An essential property to set on the user object before calling the CreateAsync method in ASP.NET Core Identity is the Email property. The email address is typically used as a unique identifier for the user and is required for account recovery and communication purposes.
What was the primary purpose of the project.json file in earlier versions of ASP.NET Core?
- Managing NuGet Package References
- Configuring Web Server Settings
- Defining Compilation Options
- Storing User Authentication Data
In earlier versions of ASP.NET Core, the project.json file was primarily used for managing NuGet package references. It provided a simple and convenient way to list and manage the dependencies required for a project, making package management more straightforward than using XML-based formats like the .csproj file.
In the context of Entity Framework Core, what is the primary use of the OnModelCreating method?
- Defining the database schema
- Handling user authentication
- Managing API endpoints
- Creating unit tests
The OnModelCreating method in Entity Framework Core is primarily used for defining the database schema. It allows developers to specify how the application's domain classes map to the database tables, including setting up relationships, keys, and other database-specific configurations. This method is essential for database initialization and migrations.
You are developing a mobile app and need a way for the app to communicate and fetch data from the server. What kind of service in ASP.NET Core would be best suited for this?
- Web API
- Blazor Server
- ASP.NET Core MVC
- SignalR
For mobile apps to communicate with a server, Web API is commonly used. It provides a RESTful way to fetch data and is well-suited for client-server communication in mobile apps.
You've been handed an ASP.NET Core application where the database schema frequently changes. Which feature of Entity Framework Core would be most useful to keep the database in sync with the application model?
- Code-First Migrations
- Model-First Approach
- Database-First Approach
- NoSQL Database
Code-First Migrations in Entity Framework Core allows you to automatically create and update the database schema based on changes to your application's model. This feature is ideal for scenarios where the database schema evolves frequently to match the application's needs.