routes.MapHttpRoute( OWIN to Self Host Web API Each resource will be identified by a specific URI (Uniform Resource Identifier). Answer: • Both are based on the same principle of Separation of concerns. HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, students); defaults: new { id = RouteParameter.Optional} These 25 solved HR Interview questions will help you prepare for the HR Round conducted during the job interviews for professionals. Register Formatter: public class StudentController : ApiController It has the ability to be hosted in IIS and self-host outside of IIS _value = value; Value is read from message body in case of complex types. Java client will want the transport protocol to be HTTP and message format to be XML for interoperability, whereas the .NET client will expect the protocol to be TCP and the message format to be binary for performance. [HttpGet] 1. Answer: Using ASP.NET Web API has following advantages : What are the Similarities between MVC and WebAPI. It is used to create simple, non-SOAP-based HTTP Services, It is also an easy method for creation with Web API. This separation of concerns can support the independent development of both client-side and server-side logic. 2 public void GetEmployee(int id) How to enable Attribute routing ? Answer: Web API will support XML, JSON, form-urlencoded data, BSON and also can support additional media types by writing a media formatter. .NET technical interview questions for beginners to 5+ years experienced users. return Task.FromResult(response); Otherwise, the second route can be chosen. If you are a web developer, you're likely familiar with Web API. { It is a framework which … “CreateErrorResponse” method is can also use along with this, which is an extension method defined in “HttpRequestMessageExtension.”. All request will be mapped to actions using HTTP verbs. } Which protocol is supported by WebAPI? 29. ASP.Net Web API is a framework to build, consume HTTP based service. 52. Routing mechanism can also be used in MVC. 1. REST will allow us to use a layered system architecture where we can deploy the APIs in server A, and will store data on server B and authenticate requests in server C. For example, a client will not ordinarily state whether it will be connected directly to the server or to an intermediary along the way. In the following example if the passed Roll Number exists in the list of students then the method returns the Student object and the status code “OK” while if the roll number doesn’t exists then “NotFound” status code is returned return BadRequest(ModelState); Answer: With the help of Attributes such as http verbs one will implement access restrictions in Web API. Open WebAPIConfig.cs fileeval(ez_write_tag([[728,90],'careerkaizen_com-box-4','ezslot_11',108,'0','0'])); Add EnableCors attribute to the Controller class and define the origin. Your email address will not be published. ASP.NET Core Interview Questions and Answers for experienced professionals and freshers. There are 2 ways to achieve this CORS (Cross-Origin Resource Sharing) public User GetStudentByName(string name) { … }. Answer: Today, a web-based application is not sufficient to reach its customers. if (productMaster == null) It will support most of the MVC features that will keep Web API over WCF. Answer: It will be used for avoiding collisions with ASP.NET MVC routing, 70. What is content negotiation in .Net Web API? 2 public void GetEmployee(int id) You Have Unlocked All the Answers! Other Type – string, int, or other entity types. What is NonActionAttribute class in WebAPI? Question3: Can we do unit test Web API? Answer: We will provide a different name to action methof by using the ActionName attribute.For example if we want to rename a method called GetStudent to search then We can use the ActionName attribute as: 1 [ActionName(“search”)] What is ASP.Net Web API routing? It is a framework which helps us to build/develop HTTP services. // POST api/ What are the various return types in ASP.Net Web API? Answer: This will represent the response of the WebAPI action method.It can allow to return the data along with the status code such as success or failure. IEnumerable students = GetStudentsFromDB(); // Write the list to the response body. API Testing Interview Questions. 37. CORS (Cross-Origin Resource Sharing) support Answer: Message handler can be used to receive an HTTP request and to return HTTP response.Message handlers will be implemented as classes deriving from HttpMessageHandler.They will implement the cross-cutting concerns. • HttpDelete. } This list includes … How are Requests mapped to Action methods in WebAPI? 67. GET request is idempotent WCF is the right choice for this. { Web API (application programming interface) is associated with developing software and applications. What is routing in WebAPI? Approach2: Attribute programming plays a important role. If the provided credential is valid then the server will send a token to the client. }. {. 65.What is the status code for “Emptry return type” in Web API? We will define HTTP verbs as attribute over method for restricting access. Answer: No, it will not be possible in Web API as Web API will create HTTP based service. Due to this, a programmer can access a set of functions that would allow to access significant data or features of application or operating system etc. 2. SOAP will use interfaces and named operations for exposing the service whereas to expose resources (service) REST will use URI and methods such as GET, PUT, POST, DELETE. The biggest disadvantage of this approach is that you cannot directly return an error code like 404 error. What is ASP.Net Web API? From 1 to 20 out of 7 asp.net web api interview questions asked in various MNCs. How to Enable HTTPS in Web API? config.Formatters.Remove(config.Formatters.XmlFormatter); 41. [EnableCors(origins: “”, headers: “*”, methods: “*”)]. Write a LINQ code for authenticate the user? Answer: Exception filter in Web API will implement IExceptionFilters interface. Web Services Interview Questions. 2. Q20.How to register exception filter globally? This constraint will specify which a Client will send a request to the server and the server will send a response back to the client. Example : Can Web API return view in MVC? { // Get a list of Students from a database. No, we can’t return a view from ASP.NET Web API Method. 27. POST is for making changes to the server. Top 50 Asp.Net Web API Interview Questions and Answers Details Last Updated: 06 November 2020 Download PDF 1) What is Web API? Content = new StringContent(_value), One-way communication or Duplex communication. We must install CORS nuget package using Package Manager Console to enable CORS in Web API. { 82 Frequently Asked Web API Interview Questions and Answers 1. Q8.How can we use Web API with ASP.NET Web Form? Answer: The following line should be included in Register() method of WebApiConfig.cs file in App_Start folder. 25. What types can WebAPI action method return? 1. Following new features are included in Web API 2 – 24. 3 { Answer: The following features are introduced in ASP.NET Web API framework v2.0: _request = request; You Have Unsubscribed from All Communications! 3. 4. HttpResponseMessage : Convert directly to HTTp Response message I compiled most frequently asked entity framework interview questions and answers for freshers and experienced dot net developers on Entity framework, architecture, Data Model, Client Data Provider, DB Context, difference Q. 3. 1 public HttpResponseMessage GetStudent(int number). ProductMaster productMaster = db.ProductMasters.Find(id); OWIN (Open Web Interface for .NET) Self Hosting db.Entry(productMaster).State = EntityState.Modified; try 20. This book contains more than 140+ ASP.NET Core interview questions. Use this technique when we required our service for supporting only JSON and not XML. Answer: Web API application will be hosted in two ways : 1. WCF will support SOAP and XML format, while Web API can support any media format including JSON, XML. 46. return response; 4 StudentRepository.Get(id); } WEB API will help for building REST-full services over the .NET Framework and it will also support content-negotiation that is not in MVC. Web API can be used with ASP.NET Web Form. 12 { Save my name, email, and website in this browser for the next time I comment. Complete support for routing What are the differences between REST and SOAP? • Since WebAPI services will not require any configuration they are very easy to consume by any client. Answer: Following is the way for constructing to do, These questions are for ASP.NET Core, MVC and Web API. then value can be obtained from the URL. WCF will support SOAP and XML format, while Web API can support any media format including JSON, XML. public HttpResponseMessage Test() It is a framework that will help us for building/developing HTTP services Answer: void : Nothing return Questions 1 [What is REST? These interview Questions have been taken from our new released eBook ASP.NET Core Interview Questions & Answers. 36. RESTFUL: It is term written by applying REST architectural concepts is called RESTful services. Answer: Following classes will help to handle the exception in ASP.Net Web API. There are following ways to implement routing in Web API. 22. In this post, we see API Testing Interview Questions. It is available in MVC application. } WCF requires lots of configuration to run, while Web API is simple and no configuration required to run. This will return XML or JSON to the client. Convention based routing 2. Above method not getting access from browser, 81. SOAP Performance is slow as compared to REST. Find the ASP.Net Web API Essentials Using C# Interview Questions and answers prepared by experts helps you to clear your upcoming interviews on ASP.Net. 6. { Answer: The disadvantage of WCF over Web API is that WCF will require a lot of configuration to work, but in Web API is simple and no extra configuration. Http Get vs Http Post Answer: No, We won’t lose any information, data and other parameters if we accidentally exit the Docker container. • Both have similar concepts such as routing,controllers and models. [image source] Q #32) Explain Swagger Components. Q11.What are main return types supported in Web API? • HttpGet Answer: Since WebAPI will use HTTP verbs so a client which can consume a WebAPI requires some way to call the WebAPI method. The request from the client will contain all the necessary information for the server for processing that request. Web API uses Json.NET library for JSON serialization. This states ASP.NET Web API to use JsonFormatter when a request will be made for text/html which is the default for most browsers. The uniform interface constraint will define an interface between the client and the server. Stateless constraint – Q9.How to you can limit Access to Web API to Specific HTTP Verb? Q10.Can you use Web API with ASP.NET Web Form? Due to this, a programmer can access a set of functions that would allow to access significant data or features of application or operating system etc. If we want to develop RESTful services in WCF, you surely need a lot of config settings, URI templates, contracts & endpoints for developing RESTful services using web API. Providing an alias to WebAPI action method SOAP will stand for Simple Object Access Protocol whereas REST stands for Representational State Transfer. How do we make sure that Web API returns data in JSON format only? 2. Answer: Following can consumes WebAPI: 27 JavaScript Tricky Interview Questions (ANSWERED) For Experienced JavaScript Developers Like any other programming language, JavaScript has its nuances. Let’s list down few URIs and their purpose to get to … That means client application and server application can be developed separately without any dependency on each other. ExceptionFilters • WebAPI will be used to develop HTTP services.Other applications call the WebAPI methods to fetch the data. Q7.What is the benefit of using REST in Web API? 1. Difference between Web Site & Web Application,User Control & Custom Control, Client-Side & Server-Side Validations, Round Trip, Global.asax File, Various Page Events & Navigation Controls in ASP.NET. In this article, I will share frequently asked ASP.Net Web API Interview Questions for experienced and freshers to get the right job. 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