In this ASP.NET Interview Questions Series, so far we have covered questions related to the core of ASP.NET technology. What we need to do here is create a single WCF service, and then configure 2 endpoints one for each client (i.e. /// Virtual method.Can be overriden with the custom Authorization. Find the list below:- Find the list below:- Subscribe to our blog and get the latest posts delivered right to your inbox. This tells ASP.NET Web API to use JsonFormatter when a request is made for text/html which is the default for most browsers. Web Application Security Interview Questions Long polling is a web application development pattern used to emulate pushing data from the server to the client. Here we go. Thursday, April 12, 2018. So, if we like to expose our service data to the browsers as well as to all these modern devices apps in a fast and simple way, we should have an API which is compatible with browsers as well as all these devices. Web API is actually accessible through HTTP protocol, it doesn't say whether it is accessed by a web browser or an application. When a request is issued from a tool like a fiddler the Accept header value should be respected. API Testing Interview Questions. Then forward the message to the second layer. It’s just that it’s a bit more complex and configuration can be a headache. That means client application and server application should be developed separately without any dependency on each other. Your email address will not be published. In the next article, i am going to discuss experienced ASP.NET Web API Interview questions with answers. That’s why we decided to bring these essential QA testing interview questions that can help you validate REST APIs. This can be saved in database or some external file. 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. ASP.NET MVC Interview Questions and Answers, SQL Server Interview Questions and Answers. The HTTP verb (GET, PUT, POST, and DELETE) that is sent with each request tells the API what to do with the resource. Question4: Tell me do you use computers? WCF supports protocols like – HTTP, TCP, Named Pipes etc. ASP.NET Web API is a framework that makes it easy to build Web API’s, i.e. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. You'll get the page to test the API. If we don’t have the limitation of .NET 3.5 and we want to create a brand new restful service then use ASP.NET Web API. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. Dot Net Interview Questions and answers. config.Formatters.Remove(config.Formatters.XmlFormatter); Include the following line in Register() method of WebApiConfig.cs file in App_Start folder. .DependencyResolver.GetService(typeof(IUserServices)) as IUserServices; var userId = provider.Authenticate(username, password); var basicAuthenticationIdentity = Thread.CurrentPrincipal.Identity as BasicAuthenticationIdentity; basicAuthenticationIdentity.UserId = userId; There are three ways in which you can use this authentication filter. What is ASP.NET Web API. The SOAP is an XML based protocol whereas REST is not a protocol but it is an architectural pattern i.e. Any system software or application software which consists of multiple APIs can perform Application Programming Interface (API) testing. Severs and clients may also be replaced and developed independently as long as the interface between them is not altered. REST architectural pattern treats each service as a resource and a client can access these resources by using HTTP protocol methods like GET, POST, PUT, and DELETE. If you are using tools like a fiddler and if you set Accept header to application/xml you will still get XML formatted data. REST stands for Representational State Transfer. The problem with this approach is that the Content-Type header of the response is set to text/html which is misleading. But WCF is still a good choice for the following scenarios: This Web API Interview Questions are asked almost all Web API Interviews. var identity = FetchAuthHeader(filterContext); var genericPrincipal = new GenericPrincipal(identity, null); Thread.CurrentPrincipal = genericPrincipal; if (!OnAuthorizeUser(identity.Name, identity.Password, filterContext)). This means that we should not be storing anything on the server related to the client. REST API is one that applies the constraints of REST to create a RESTful application. . Software security is not limited to web application security. In this article, I am going to discuss the most frequently asked ASP.NET Web API Interview Questions and Answers. var dnsHost = filterContext.Request.RequestUri.DnsSafeHost; filterContext.Response = filterContext.Request.CreateResponse(HttpStatusCode.Unauthorized); filterContext.Response.Headers.Add("WWW-Authenticate", string.Format("Basic realm=\"{0}\"", dnsHost)); /// Custom Authentication Filter Extending basic Authentication, public class ApiAuthenticationFilter : GenericAuthenticationFilter, /// AuthenticationFilter constructor with isActive parameter, public ApiAuthenticationFilter(bool isActive), /// Protected overriden method for authorizing user, protected override bool OnAuthorizeUser(string username, string password, HttpActionContext actionContext), var provider = actionContext.ControllerContext.Configuration. The following article explains REST and RESTful web services architecturally by providing a comprehensive list of Rest API testing interview questions and answers. To understand the uniform interface constraint, we need to understand what a resource is and the HTTP verbs – GET, PUT, POST and DELETE. Use this technique when we want our service to support only JSON and not XML. This line of code completely removes JsonFormatter which forces ASP.NET Web API to always return XML irrespective of the Accept header value in the client request. Answer: API is a collection of routines, tools, protocols that together are required for building the software application. What port is for ICMP or pinging? These devices are having a lot of apps for making their life easy. There are a number of ways to accomplish this security, one of which is with the exchange of tokens. Each resource is identified by a specific URI (Uniform Resource Identifier). For example, we want to build a single service that can be consumed by 2 different clients – Let’s say, a Java client and .NET client. Authentication is a technique where user id and password has been passed. The SOAP message consists of an envelope which includes SOAP headers and body to store the actual information we want to send whereas REST uses the HTTP build-in headers (with a variety of media-types) to store the information and uses the HTTP GET, POST, PUT and DELETE  methods to perform CRUD operations. Since Web API services do not require configuration, they can be easily used by any client. ASP.NET Web API is an ideal platform for building Restful services. 14) Mention what is the basic design of OWASP ESAPI? We can also maintain session using token based atuhorization. This constraint says that let the client know how long this data is good for so that the client does not have to come back to the server for that data over and over again. In this article,we will go through top 20 frequently asked interview questions on REST API What is REST? I would like to have your feedback. Banking & Finance. It supports most of the MVC features which keep Web API over WCF. Visit the blog for .Net FAQ,.Net interview questions,ASP .Net FAQ, C# .Net FAQ,ASP .Net interview questions, interview question on .Net, interview questions on C#. Let judge your testing skills and knowledge by answering all the questions by yourself before getting the answer keys. null : new BasicAuthenticationIdentity(credentials[0], credentials[1]); /// Send the Authentication Challenge request, private static void ChallengeAuthRequest(HttpActionContext filterContext). For each method, there have to be attributes like – “WebGet” and “WebInvoke”. The Media-Type Formatters are classes which are responsible for serializing request/response data so that web API can understand the request data format and send data in the format which client expects. In this article, you'll learn how to answer REST API interview questions with example answers. Typically, this will be called WEB API self-hosting. HTTP based services on top of the .NET Framework. 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Welcome to the Web Services Interview Questions with detailed answers. Here I am providing you a list of web services interview questions to help you in interview. WCF can only be consumed by clients, which can understand XML. So the more natural choice for creating REST services is ASP.NET Web API, which is specifically designed for this purpose. MVC is used to create web applications that return both views and data but ASP.NET WEB API is used to create rest full HTTP services with the easy and simple way that returns only data, not view. In this article, I will share frequently asked ASP.Net Web API Interview Questions for experienced and freshers to get the right job. Dynamic Security Tests : Dynamic security tests done by a professional security testing team should be an important part of the release cycle. config.Formatters.Add(new CustomJsonFormatter()); SOAP enforces message format as XML whereas REST does not enforce message format as XML or JSON. So there will a client server communication using HTTP protocol. 18) Can you use Web API with ASP.NET Web Form? authorization. The REST was first introduced in the year 2000 by Roy Fielding as part of his doctoral dissertation. … With the increasing demand for data-centric projects, companies have quickly opened their data to their ecosystem, through SOAP or REST APIs. What we … What is Representational state transfer or REST? I hope you enjoy this ASP.NET Web API Interview Questions and Answers article. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. dot net security interview questions with example, .net security interview questions, concepts in security issues, impersonation in ASP.NET 1. Q #1) What is API Testing? Sort an Array which contains only 0 and 1. Some data provided by the server like the list of products, or list of departments in a company does not change that often. WEB API also takes care of returning data in a particular format like JSON, XML or any other based upon the Accept header in the request. WCF is more suited for building services that are transport/protocol independent. REST represents REpresentational State Transfer; it is a relatively new aspect of writing web API. Q2. config.Formatters.Remove(config.Formatters.JsonFormatter); With this change, irrespective of the Accept header value (application/xml or application/json), the Web API service is always going to return XML. Yes, It is possible to use Web API with ASP.Net web form. Required fields are marked *, In this article, I am going to discuss the most frequently asked, REST stands for Representational State Transfer. In WEB API the request is mapped to the actions based on HTTP verbs but in MVC it is mapped to actions name. For this scenario, WCF is the right choice. A good developer will have questions during and after the interview process. But how does web API handles these different formats? Your email address will not be published. ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. Web API Security There are two technique for security in Web API. Include the following line in Register() method of WebApiConfig.cs file in App_Start folder. Now when you run this application, you'll see the Authenticate API as well, just invoke this API with Basic Authentication and User credentials, you'll get the token with expiry, let's do this step-by-step. resource-based architecture. According to research API Testing has a market share of about 16.7%. Here I am providing you a list of web services interview questions to help you in interview. There are two technique for security in Web API. Asp.net Web API security interview questions What is ASP.NET Web API? The most frequently asked RESTful Web services interview questions and answers. Q1. Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire a dream career as API Testing Developer. are all resources. Here, in this article, I try to explain most frequently asked. What are the Differences between WCF Rest and Web API? Ans: Ping doesn’t use any port. Web application security testing is defined as the testing of the security mechanism employed in web applications to protect it from bad people. If you are using tools like a fiddler and if you set Accept header to application/xml you will still get XML formatted data. A list of frequently asked API Testing interview questions and answers are given below.. 1) What is API? .Add(new MediaTypeHeaderValue(“text/html”)); config.Formatters.Add(new CustomJsonFormatter()); With these 2 changes, when a request is issued from the browser you will get JSON formatted data and the Content-Type header of the response is also set to application/json. In the next article, I am going to discuss the Experienced ASP.NET Web API Interview questions and answers. This is the first constraint. ASP.NET Web API is a framework for building HTTP based service, that can communicate using different data format like XML and JSON, Asp.Net Web service can reach to different clients like browsers, mobile, IoT devices, etc. It’s a misconception that ASP.NET Web API has replaced WCF. 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. What is ASP.Net Web API? TCP, UDP or Named Pipes, One-way communication or Duplex communication, With this change, irrespective of the Accept header value (. Any system software or application software which consists of multiple APIs can perform Application Programming Interface (API) testing. It works the way HTTP works using standard HTTP verbs like GET, POST, PUT, DELETE, etc. The difference between REST and SOAP is given below: WCF (Windows Communication Foundation) is one of the choices available in .NET for creating both SOAP and REST services. These services can then be consumed by a broad range of clients like. 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To a software development Interview, it can also maintain session using token based atuhorization you use API... Each request can be implemented with a simple class bring these essential QA testing Interview Questions that can help in.