5. You Have Unsubscribed from All Communications! 5 if (stud != null) { 2. click on ok Advantages of using ASP.Net Web API. Can Web API return view in MVC? In a POST request, we will send binary as well as text data. Answer: void will return empty content and its code is 204. Let start the ASP.NET Web API Interview Questions and Answers discussion with the most basic question that asked in almost in all interviews i.e. How do we make sure that Web API returns data in JSON format only? Answer: We will just add an attribute as shown below – if (id != productMaster.id) 4 StudentRepository.Get(id); SOAP is an XML message format used in web service interactions. App_Start –> WebApiConfig.cs Http Get vs Http Post if (!ProductMasterExists(id)) db.SaveChanges(); IHttpActionResult Skilled web developers will offer real solutions to practical issues, such as how to improve load times or optimize the user experience. Void Web API vs WCF REST API. In WEB API HttpError used to throw the error info in the response body. List of Top 20 Most Important ASP.NET Interview Question. 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”)] Answer: API is a collection of routines, tools, protocols that together are required for building the software application. } 4. { Interview Questions Relating To a Web Developer’s Experience Where is the route is defined in Web API? { These are the best Web API interview questions. You Have Unlocked All the Answers! POST parameter is included in the body, Get request will not make any changes to the server public ActionResult Insert(){ 34. Also useful for MCTS, MCAD, MCSD and other Microsoft certification exams This is not a good practice in the context of security. 2. var response = new HttpResponseMessage() 31. GET request is idempotent then value can be obtained from the URL. 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. } • Even portable devices like Mobile devices can easily consume WebAPI.It is the biggest advantages of WebAPI. How to implement Basic Authentication in ASP.Net Web API? WCF Interview Questions and answers for experienced, fresher with example, WCF service interview questions, WCF advanced Interview questions, WCF security Interview Questions MONTH START OFFER : Flat 15% Off with Free Self Learning Course | Use Coupon MONTH15 COPY CODE 4 StudentRepository.Get(id); { return response; public void Post([FromBody]string value) Answer: System.Web.Http.Results namespace. }. IHttpActionResult – internally calls will ExecuteAsync for creating an HttpResponseMessage. • IHttpActionResult This acts as the factory for creating HttpResponseMessage. Answer: A better approach for securing .Net Web API is by authenticating users by a signed token which is called token-based approach. Exception filters will implement “IExceptionFilter” interface. REST architectural pattern can treat each service as a resource and a client will access these resources by using HTTP protocol methods such as GET, POST, PUT, and DELETE. We hope these Dot Net Interview Questions and answers are useful and will help you to get the best job in the networking industry. “CreateErrorResponse” method is can also use along with this, which is an extension method defined in “HttpRequestMessageExtension.”. Ans: It is a framework which helps us to build/develop HTTP services. As it is bundled with ASP.NET MVC framework. Assume we require to serve Web API to be accessible only over secure HTTP example for HTTPS and not over HTTP. Is it possible to have MVC kind of routing in Web API? else public IHttpActionResult GetProductMaster(int id) Layered System- Here I am providing you a list of web services interview questions to help you in interview. OWIN (Open Web Interface for .NET) Self Hosting Answer: We will not return view from Web API. How to consume Web API using HttpClient? Explain Action Results in WebAPI ? The first route can only be selected whenever the “id” segment of the URI is an integer. response.Headers.CacheControl = new CacheControlHeaderValue() framework. Some other type – we will write the serialized return value into the response body. ProductMaster class. }, // Restrict by Role config.Formatters.Remove(config.Formatters.XmlFormatter); • WebAPI will be used to develop HTTP services.Other applications call the WebAPI methods to fetch the data. 81. 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 6 { What are the differences between REST and SOAP? db.SaveChanges(); return CreatedAtRoute(“DefaultApi”, new { id = productMaster.id }, productMaster); The experienced professional has to show more expertise, achievements, and clarity of thought. The following clas should be included in WebApiConfig.cs file in App_Start folder. Web API will be accessed by anyone who will know the URL. { RESTful Web Services Interview 24. For this reason, we have given a complete set of frequently asked API interview questions answer in this blog. 4 } Top ASP.Net Web API Interview Questions and Answers for freshers and 2-5 year experienced dot net developers with explanation and examples. • HttpResponseMessage This allows to have control over the response. 10. WCF will support SOAP and XML format, while Web API can support any media format including JSON, XML. How to return only JSON from ASP.NET Web API Service irrespective of the Accept header value? You would be able to answer these questions if you have the basic understanding of the technology or worked on the technology before. IHttpActionResult – internally calls ExecuteAsync to create an HttpResponseMessage, Other types – You can write the serialized return value into the response body. These interview Questions have been taken from our new released eBook ASP.NET Core Interview Questions & Answers. ASP.NET WEB API Interview Questions & Answers Click if you like the project. }. This is the first constraint. 61. What we … It will be help in the Spring REST related questions in the interview. _request = request; What is ASP.Net identity? 2. }. Answer: GET and POST is two important HTTP verbs. 8. { Message Queuing scenario will be using MSMQ. Question3: Can we do unit test Web API? What is Web API Routing? Web API is an open source platform. return response; Answer: 1. go to run type command mmc This is used for creating a service using HTTP verbs ASP.Net Web API is a framework to build, consume HTTP based service. 2. 1. 1) Explain what is REST and RESTFUL? Save my name, email, and website in this browser for the next time I comment. 9. Attribute-based routing 23. This token will contain user details for the identification with an expiry time. This list includes ASP.NET interview questions for freshers, ASP.NET interview questions for 1 year experience, ASP.NET interview questions for 2 years experience, ASP.NET interview questions for 3 years experience, ASP.NET interview questions for 4 years experience, ASP.NET interview questions for 5 years experience. Is it true that ASP.NET Web API has replaced WCF? 50. } 67. 4. Some other type : Write a serialized return value, public HttpResponseMessage GetData() What are the Similarities between MVC and WebAPI. public class StudnetController : ApiController {. 12 { In this ASP.NET Interview Questions Series, so far we have covered questions related to the core of ASP.NET technology. different end points. Top 25+ Web API Interview… Web API (application programming interface) is associated with developing software and applications. }, [HttpPost] How parameter binding works in Web API? IIS Hosting – Web API will also be hosted with IIS and the process can be similar to hosting a website. WCF is good for developing service oriented applications and ASP.Net Web API is perfect for building HTTP services. Answer: The following features are introduced in ASP.NET Web API framework v2.0: public class TestController : ApiController 2. }; Q2.Why is Web API required? 46. { POST request is non-idempotent.eval(ez_write_tag([[580,400],'careerkaizen_com-leader-1','ezslot_12',111,'0','0'])); In a GET request, we will send data in plain text. This DotNet Interview Questions and Answers are designed for beginners as well as experienced programmers looking for a change in their job. WCF How to enable Attribute routing ? }eval(ez_write_tag([[250,250],'careerkaizen_com-leader-4','ezslot_7',123,'0','0']));eval(ez_write_tag([[250,250],'careerkaizen_com-leader-4','ezslot_8',123,'0','1'])); 71. A protocol All answers for these ASP.NET Core Web API questions … January 1, 2020 January 1, 2020 by Viswanath Annangi. //logic throw new HttpResponseException(HttpStatusCode.NotFound); Once the client will received the token, it will use this token to access API resources wherever authentication requires. Answer: In ASP.Net Web API, content negotiation will be performed at the server-side. Convention based routing When applying for an API software engineering job, you will need to demonstrate that you have a firm grasp of API, as well as API testing, SOAP and REST. 40. Answer: Yes, Web API will be used with ASP.Net Forms. It is lightweight architecture and ideal for devices that have limited bandwidth like smartphones. Answer: Basic Authentication is a simple authentication mechanism where the client will send request with an Authorization header with word Basic. Complete support for routing If we will not have the limitation of .NET 3.5 and we required to create a brand new restful service then use ASP.NET Web API. response.Content = new StringContent(“hello”, Encoding.Unicode); • HttpPost The difficulty level of web developer technical interview questions will not be the same as that of web developer job interview questions and answers for a newbie. HTTP (HyperText Transfer Protocol) can manage the request-response between client and server. RESTFUL: It is term written by applying REST architectural concepts is called RESTful services. response.Headers.CacheControl = new CacheControlHeaderValue() API Testing Interview Questions. Typically, this can be called WEB API self-hosting. [HttpGet] 27 JavaScript Tricky Interview Questions (ANSWERED) For Experienced JavaScript Developers Like any other programming language, JavaScript has its nuances. Top 20 Most Important Web API Interview Questions for freshers and 2-5 year experienced./p>ASP.NET Web API is a framework provided by the Microsoft. 22. public IHttpActionResult PostProductMaster(ProductMaster productMaster) Therefore, there is no mention of the method name above.Instead GetEmployee method will be called using the GET HTTP verb. In this article, we present seven common Web API interview questions along with their answers to help you prepare to get the job. if (productMaster == null) Answer: Exception filter in Web API will implement IExceptionFilters interface. We will define HTTP verbs as attribute over method for restricting access. Here we go. What is Bearer Authenticating in .Net Web API? In this ASP.NET Interview Questions Series, so far we have covered questions related to the core of ASP.NET technology. What is routing in WebAPI? In this MVC interview questions article, I have collected the most frequently asked questions which are collected after consulting with top industry experts in the field of design patterns, ASP.NET and Spring Framework.If you want to brush up with the MVC basics, which I recommend you to do before going ahead with this MVC Interview Questions, take a look at this article on MVC … For using OData in ASP.Net Web API, We required the OData package by running below command in Package Manager Console. }. IHttpActionResult : Call ExecuteAsync for creating an HttpResponseMessage, change to an HTTP response message. 2 public ActionResult GetStudent(int id) Answer: We can provide Alias name by adding an attribute ActionName, [ActionName(“InertUserData”)] public class StudentController : ApiController Answer: The HttpResponseException most common exception in WebAPI. 4. JsonMediaTypeFormatter which will handle JSON and XmlMediaTypeFormatter handles XML. Now, you can begin exploring the most important REST API interview questions that we laid out for both the beginners and experienced testers. GlobalConfiguration.Configuration.Filters.Add(new MyTestCustomerStore.NotImplExceptionFilterAttribute()); REST represents REpresentational  State Transfer; it is entirely a new aspect of writing a web app. 2. For example, we want to build a single service which can be consumed by 2 different clients – a Java client and .NET client. Explain REST? }. It will work as HTTP works using standard HTTP verbs like GET, POST, PUT, DELETE, etc. MaxAge = TimeSpan.FromMinutes(20) Top ASP.Net Web API Interview Questions and Answers for freshers and 2-5 year experienced dot net developers with explanation and examples. CORS (Cross-Origin Resource Sharing) support 2 { ASP.NET Core Interview Questions and Answers for experienced professionals and freshers. 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. Answer: WebAPI controllers will represent different entities in application and different action methods will be mapped using HTTP verbs like POST and GET. Q8.How can we use Web API with ASP.NET Web Form? { 6 }. If we are stuck with .NET 3.5 or we have an existing SOAP service we should support but required to add REST to reach more clients, then use WCF. What’s new in ASP.Net Web API 2.0? To understand the uniform interface constraint, we required to understand what a resource is and the HTTP verbs – GET, PUT, POST and DELETE. Attribute Routing return studentinfo; Client will use HTTP verbs to call the WebAPI action methods.For example to call a method called GetEmployee a client will use a jQuery method as: 1 $.get(“/api/Employees/1”, null, function(response) { WCF requires lots of configuration to run, while Web API is simple and no configuration required to run. Table of Contents No. 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. What are the differences between ASP.NET MVC and ASP.NET Web API? Labels: asp.net web api interview questions and answers for experienced, web api interview questions and answers for experienced pdf, web api interview questions advanced, web api interview questions, life cycle of web api, Will you lose all of your work if you accidentally exit a container? We will not be storing anything on the server related to the client. 29. public Product GetStudentDetails(int rno) 3. Answer: Web API application will be hosted in two ways : 1. What is ASP.Net Web API routing? Web API uses library for JSON serialization. It is easy to restrict access to an ASP.NET Web API method to be called using a particular HTTP method. Web API creates HTTP services that render raw data. Route(“product/{productid}/category”)] 3. HttpResponseMessage – this can convert response for an HTTP response message. 6. [Authorize(Users=”Shiva,Jai”)] 4 == number).FirstOrDefault(); { 4. Answer: Action methods in Web API will accept parameters as a query string in URL or it will accept with the request body. Top 10 ASP.NET Web API Interview Questions; Top 10 ASP.NET AJAX Interview Questions; Top 10 WCF Interview Questions; Comprehensive Series of WCF Interview Questions; Most popular ASP.NET MVC and related Online Courses The Complete ASP.NET MVC 5 Course. WEB API is open source and an ideal platform to build REST-full services over the .NET Framework. 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