What is the purpose of the [ApiController] attribute in ASP.NET Core?
a. To enable automatic model validation and binding
b. To define API routes
c. To handle HTTP request logging
d. To configure authentication
Answer: a. To enable automatic model validation and binding
Which class is typically used to represent the response from a Web API call?
a. HttpResponseMessage
b. HttpClient
c. HttpRequest
d. HttpContext
Answer: a. HttpResponseMessage
What attribute would you use to specify that an action method responds to HTTP DELETE requests?
a. [HttpDelete]
b. [Delete]
c. [HttpRemove]
d. [Remove]
Answer: a. [HttpDelete]
In ASP.NET Core, which method is used to configure routing for Web API controllers?
a. MapControllers
b. UseRouting
c. ConfigureRoutes
d. SetRoutes
Answer: a. MapControllers
How do you apply authorization policies to Web API controllers in ASP.NET Core?
a. By using the [Authorize] attribute
b. By configuring policies in Startup.cs
c. By adding authorization middleware
d. By setting policies in appsettings.json
Answer: a. By using the [Authorize] attribute
What is the function of the IActionResult interface in ASP.NET Web API?
a. To represent various types of action results
b. To manage the HTTP request
c. To handle API routing
d. To configure authentication
Answer: a. To represent various types of action results
How can you retrieve a route value in an action method?
a. By using HttpContext or route parameters
b. By querying the database
c. By using the request body
d. By inspecting the HTTP headers
Answer: a. By using HttpContext or route parameters
Which HTTP verb is typically used for creating new resources in a Web API?
a. POST
b. GET
c. PUT
d. DELETE
Answer: a. POST
How do you return a created response with a location header in a Web API method?
a. By using Created(location, value)
b. By using Ok(value)
c. By using BadRequest()
d. By using NoContent()
Answer: a. By using Created(location, value)
What is the purpose of the [FromQuery] attribute in a Web API method?
a. To bind a parameter from the query string
b. To bind a parameter from the request body
c. To bind a parameter from route data
d. To bind a parameter from the HTTP headers
Answer: a. To bind a parameter from the query string
What does the JsonResult class do in ASP.NET Web API?
a. It returns JSON-formatted data as a response
b. It formats XML data
c. It handles authentication
d. It manages request routing
Answer: a. It returns JSON-formatted data as a response
How can you handle exceptions globally in an ASP.NET Core Web API application?
a. By using middleware or exception filters
b. By catching exceptions in each action method
c. By configuring error handling in web.config
d. By using try-catch blocks in Startup.cs
Answer: a. By using middleware or exception filters
What is the purpose of the ContentResult class in ASP.NET Core Web API?
a. To return content with a specific media type and content
b. To manage API routing
c. To handle model validation
d. To configure response headers
Answer: a. To return content with a specific media type and content
How can you specify that an action method should be invoked when the request URL matches a certain pattern?
a. By using the [Route] attribute
b. By using the [HttpMethod] attribute
c. By defining routes in Startup.cs
d. By configuring routes in appsettings.json
Answer: a. By using the [Route] attribute
What is the role of the HttpClient class in ASP.NET Core?
a. To make HTTP requests and handle responses
b. To manage Web API routes
c. To handle model binding
d. To configure authentication
Answer: a. To make HTTP requests and handle responses
How do you apply model validation in an ASP.NET Core Web API application?
a. By using data annotations and the [ApiController] attribute
b. By manually checking model properties
c. By configuring validation in Startup.cs
d. By defining validation rules in web.config
Answer: a. By using data annotations and the [ApiController] attribute
What is the purpose of the CreatedAtAction method in a Web API controller?
a. To create a response that includes a location header and the result of the action
b. To return a no-content response
c. To return an error message
d. To return a bad request response
Answer: a. To create a response that includes a location header and the result of the action
How do you handle route parameters in ASP.NET Core Web API?
a. By including them in the route template and accessing them as method parameters
b. By querying the request body
c. By configuring them in web.config
d. By defining them in Startup.cs
Answer: a. By including them in the route template and accessing them as method parameters
What is the purpose of the NoContent method in an ASP.NET Core Web API action?
a. To return a 204 No Content response
b. To return a 200 OK response with no content
c. To return a 400 Bad Request response
d. To return a 404 Not Found response
Answer: a. To return a 204 No Content response
Which method is used to retrieve data from a Web API using HTTP GET in ASP.NET Core?
a. HttpClient.GetAsync
b. HttpClient.PostAsync
c. HttpClient.PutAsync
d. HttpClient.DeleteAsync
Answer: a. HttpClient.GetAsync
How can you return a conflict response in a Web API method?
a. By using Conflict()
b. By using Error()
c. By using NotFound()
d. By using BadRequest()
Answer: a. By using Conflict()
What attribute would you use to specify that an action method should only be invoked for HTTP PATCH requests?
a. [HttpPatch]
b. [Patch]
c. [HttpModify]
d. [Modify]
Answer: a. [HttpPatch]
How do you configure the API routing in the Startup.cs file for ASP.NET Core?
a. By using app.UseEndpoints(endpoints => { endpoints.MapControllers(); })
b. By defining routes in ConfigureServices method
c. By setting routing in appsettings.json
d. By configuring routes in web.config
Answer: a. By using app.UseEndpoints(endpoints => { endpoints.MapControllers(); })
What is the role of the ActionResult<T> class in ASP.NET Core Web API?
a. To represent the result of an action method and return data of type T
b. To handle HTTP request routing
c. To configure API versioning
d. To manage authorization policies
Answer: a. To represent the result of an action method and return data of type T
What attribute do you use to indicate that an action method should be invoked for HTTP OPTIONS requests?
a. [HttpOptions]
b. [Options]
c. [HttpMethod]
d. [HttpRequest]
Answer: a. [HttpOptions]
How can you use dependency injection in ASP.NET Core Web API?
a. By registering services in Startup.cs and injecting them into controllers
b. By manually creating instances in controllers
c. By configuring dependencies in web.config
d. By using static properties
Answer: a. By registering services in Startup.cs and injecting them into controllers
What is the purpose of the ProblemDetails class in ASP.NET Core Web API?
a. To provide a standardized way of representing error details in responses
b. To handle API routing
c. To manage model validation
d. To configure authorization policies
Answer: a. To provide a standardized way of representing error details in responses
How do you handle complex data binding in a Web API method?
a. By defining models and using [FromBody] or [FromQuery] attributes
b. By manually parsing the request body
c. By configuring data binding in web.config
d. By using the ModelState property only
Answer: a. By defining models and using [FromBody] or [FromQuery] attributes
What is the function of the Select method in LINQ queries used in Web API?
a. To project each element of a sequence into a new form
b. To filter elements of a sequence
c. To group elements of a sequence
d. To order elements of a sequence
Answer: a. To project each element of a sequence into a new form
How can you ensure that Web API responses are formatted as JSON?
a. By configuring JSON formatters in Startup.cs
b. By setting the Accept header in the request
c. By using the [Produces] attribute on action methods
d. By specifying JSON format in web.config
Answer: a. By configuring JSON formatters in Startup.cs
What does the CreatedAtRoute method do in ASP.NET Core Web API?
a. It creates a response with a location header and uses a route name for the location
b. It returns a status code of 201 Created without a location header
c. It returns a no-content response
d. It returns an error response
Answer: a. It creates a response with a location header and uses a route name for the location
How can you include additional headers in a Web API response?
a. By using the HttpResponse object in action methods
b. By setting headers in the request body
c. By configuring headers in Startup.cs
d. By using middleware to handle headers
Answer: a. By using the HttpResponse object in action methods
What does the [ApiExplorerSettings(IgnoreApi = true)] attribute do?
a. It hides the action or controller from API documentation
b. It enables API documentation
c. It configures API versioning
d. It specifies API routing
Answer: a. It hides the action or controller from API documentation
How can you perform asynchronous operations in a Web API method?
a. By using async and await keywords in action methods
b. By using synchronous methods only
c. By configuring async operations in web.config
d. By defining async operations in Startup.cs
Answer: a. By using async and await keywords in action methods
What is the purpose of the DefaultApi route in Web API routing?
a. To provide a default route template for Web API controllers
b. To configure authorization policies
c. To manage database connections
d. To handle model validation
Answer: a. To provide a default route template for Web API controllers
How can you specify a default response format for Web API in ASP.NET Core?
a. By configuring formatters in Startup.cs
b. By setting format in web.config
c. By using the [Produces] attribute on controllers
d. By specifying format in the HTTP request
Answer: a. By configuring formatters in Startup.cs
What is the purpose of the ValueProvider in model binding?
a. To retrieve values from different sources such as query strings, route data, and form data
b. To handle API routing
c. To manage authentication
d. To configure response formatting
Answer: a. To retrieve values from different sources such as query strings, route data, and form data