Answer:- Filters allow us to set the desired result over any action done by the user. With the help of this, we can override the default return HTTPResponseMessages. Filter used by Web API are: 1. Auction Filter – Adds functionality to the Web API services. 2. Authorization Filter – Checks the authentication of the clients, including browsers. 3. Authorized Filter – Filters the authorized user and separates it. 4. Authorize Attribute – Allows only authorized clients. 5. Override Filter – Excludes the particular controllers and actions. 6. Exception Filter – Handles the unhandled filters.

Answer:- No, not at all, as both are different in their domains. If we compare Web API and WCF, there are many differences between them, making both stand out in their positions. WCF is specialized to develop only SOAP-based services. Whereas using ASP.NET Web API, we can build non-SOAP-based services like develop RESTful services.

Answer:- HTTPConfiguration is just a specific class of Web API. And, this class of Web API is helpful to overrule the default action of Web API. Properties of HTTPConfiguration are as follows: 1. DependencyResolver – Handles dependency injection. 2. MessageHandlers – Decides and handles the message response. 3. ParameterBindingRules – Set of rules for binding all the parameters. 4. IncludeErrorDetailPolicy – Sets error messages. 5. Formatters – Uses internet media-type compositions. 6. Properties – Collects properties of the Web at the moment. 7. Services – Acquires Web API services. 8. Filters – Adds a filter to the requests. 9. Routes – Collects the routes for the Web API.

Answer:- REST stands for REpresentational State Transfer. REST is a structural pattern used in performing web co-operations. If the HTTP protocol is successful, the service provider sends data in JSON format, HTML, or XML format. If we talk about RESTful, it is the term practiced in the REST for web services it presents.

Answer:- HTTP methods used by Web API are as follows: • GET – Used to procure data from the service provider. • POST – Used to append data to the service provider data by making a request. • PUT – Used to request the service provider for allowing updating data. • DELETE – Used to delete the data. • CONNECT – Used for establishing a connection to the service provider. • HEAD – Used to check the approachability, availability, volume, and last alteration date of a source without downloading it. • TRACE – Tracks the history of all the data, which further helps in debugging the arguments. • OPTIONS – Specifies the way of communication and objective for the destination source.

Answer:- Cross-origin resource sharing(CORS) is a method that allows sending requests from one website to another. It makes it more straightforward for one to pull data from other websites to any particular website. Overriding the Same Origin Policy(SOP) CORS helps its clients quickly relocate the data. From other websites without affecting the security of the website.

Answer:- Parameters used to create requests in REST API are: 1. Header parameter – Used for authorization. 2. Query parameter – Helps to target peculiar content or operation. 3. Request body parameter – Used to impart and acquire information. 4. Template parameter – Used to parametrize the request path 5. Matrix parameter – Added before the query string in the request path.

Answer:- HTTPResponseMessage allows us to keep track of the status of the request sent to the service provider. By which we can assume the events. It works on the HTTP protocols and returns the proper status code that is the HTTP response message making things easier for clients to understand. If the request sent was successfully admitted or renounced.

Answer:- Advantages of using ASP.NET Web API: 1. ASP.NET Web API supports all the MVC features, including routing, filter, and controllers. 2. It is very light and easy to use. 3. It is an ideal platform for building applications of Low Bandwidth. 4. Most suitable to develop non-SOAP HTTP Based Services. 5. Content negotiation and several drive support make it more convenient to use.

Answer:- Caching is the method of depositing and transmitting the data into the software identified as Cache. We can understand Cache as a storeroom. Cache helps to run the processor comparatively fast by storing all the in an auxiliary location.

Answer:- HTTPError exception filters handle all the exceptions thrown while making the HTTP requests and are unhandled by other filters. Then these filters deal with all the filtered exceptions.

Answer:- A series of message handlers are chained together to respond to several HTTP requests in the server. And finally, at some point. The response is generated and is returned to the client back in the opposite direction. And, this process of receiving the request and then returning the response to the client is known as Delegating handler.

Answer:- Yeah, it is possible. We can use ASP.NET Web API in applications generated using other .NET languages. The only mandatory thing is that it needs to support the HTTP protocol.

Answer:- Content negotiation defines the format of the response. To be sent back to the range of clients. And, this makes the Web API work more explicitly when used on different devices other than PC like mobile devices and tablets.