Answer:- If the API you are trying to call is already hosted somewhere in the world, you may expect latency.

Answer:- Youtube API, Facebook API, Twitter API are few influential APIs from well-known brands. Some other significant Web APIs are Web audio API, Full-screen API, Channel messaging API.

Answer:- For JSON serialization Json.NET library is used by Web APIs.

Answer:- For now, the Web API net framework supports NET 4.0 and above frameworks.

Answer:- Web 2.0 is the latest version of the Web API, which includes new modern specialties.

Answer:- There is no such difference between these two. Web API 2.0 is just an extension in the old version of Web API that supports a few more features like AttributeRouting, OWIN self-host, IHttpActionResult, CORS, HttpRequestContext, Testability, ODATA Improvements, Filter Overrides, ByteRangeStreamContent, making it more productive.

Answer:- Web API provides help for parsing different URLs on a web page by handling all the HTTP requests and directly routes the request with the action. This process is called Web API routing. Web API routing routes the matching URLs to the matching routes from the routing table.

Answer:- Currently, there are only two types of routing – • Conventional Based – Conventional based routing requires you to add similar routes to the URLs. But there is a drawback that needs to be kept in mind while using conventional routing. That is, you need to arrange all the routes. First, more specified followed by less specified and similar paths in the Route Table. • Attribute-Based – Attribute-based routing is a new specialty in Web API routing 2.0, which uses attributes to set routes. It provides the user a good versatility while shifting to another URL.

Answer:- Web API versioning allows its clients to make a change or update the data. But this requires one to have permission to do so. To make changes in the data, the client needs to request the service provider.

Answer:- Web API mainly works on the four HTTP protocols, which we can also understand by the CRUD method Create, Read, Update and Delete. Here Create stands for POST, Read for getting, Update for PUT and Delete for DELETE.

Answer:- HTTP status codes are the three-digit code that indicates the response of the server. 1. If one receives a status code in range 1XX, it indicates that the server has received the request, and the outcome is processed. 2. If the response is in range 2XX, it indicates that the request was successful and the server has accepted it. 3. If the response is in range 3XX, then the request has been redirected for further examining. 4. If the response is in range 4XX, then the client has made mistakes in making the request. 5. And, if you receive a response in range 5XX, then there’s a problem from the server’s side in processing the information.

Answer:- 1. The Postman is one of the popular tools for building API and monitoring it. It is a user-friendly and free open-source application. It is excellent for the development of RESTful services. 2. Fiddler is just another free application that enables you to perform different checks on the HTTP protocols and requests. And also create it.

Answer:- Authorize Attributes maintains the security of the application by keeping a check on the authorized and unauthorized users. It helps us to keep the server secure by allowing only the authorized users. We can also quash this attribute by using AllowAnonymous Attribute. If the user is unauthorized, the server returns the HTTP responses with the HTTP status code 4XX. Uses of Authorize Attribute: 1. It keeps the server safe and secure from unsafe external use. 2. By restricting the entrance, only approved users can use it.

Answer:- REST stands for REpresentational State Transfer, while SOAP stands for Simple Object Access Protocol. REST is a structural pattern used in performing web co-operations. If the HTTP protocol is successful, the service provider sends the data in HTML, plain XML, or JSON string.