var mytestjson = GlobalConfiguration.Configuration.Formatters.JsonFormatter;mytestjson.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented; Ans: Using “Newtonsoft.Json.Linq.JObject” we can serialize and deserialize weakly typed objects. 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The above web developer interview questions and answers will help you to get an understanding of the type of questions you can expect in such interviews. ASP.Net Web API is a framework to build, consume HTTP based service. For JSONit will return JSONResult from action method. Its light weight and its fast in encode/decode. Top 25 entity framework interview questions answers talent economy top 16 ado net entity framework interview questions answers top 20 entity framework interview questions must have web development tutorial ado net entity framework interview questions codeproject. Web services are a very vast topic. config.Routes.MapHttpRoute(name: "MyRoute",//route namerouteTemplate: "api/{controller}/{action}/{id}",//as you can see "api" is at the beginning.defaults: new { id = RouteParameter.Optional }); Ans: Below is the sample code snippet to show MVC Routing –. Ans: There should be atleast one route defined for MVC and Web API to run MVC and Web API application respectively. Ans: It is a framework which helps us to build/develop HTTP services. Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire a dream career as API Testing Developer. API Testing Interview Questions. Other Recommended Articles. Enlist some important constraints for RESTful web services. This allows to add features of login in our application. In Web API routing “action” parameter is not mandatory but it can be a part of routing. We cannot return view from Web API. Ans: Below are the steps to be followed –. It is a framework which helps us to build/develop HTTP services. How we can create SOAP and RESTful web services in Java. We help you to choose the right Python career Path at myTectra. “Over-Posting” – If the client sends more data than expected in binding then it’s called over-posting. Question 10. Category: Interview Questions Tags: Interview Questions, web services., windows communication foundation About IMRAN ABDUL GHANI Imran Abdul Ghani is working as Software Developer(Senior) with extensive knowledge in Web development technologies especially C#, ASP.NET, MVC, WCF, Web API, ADO.NET Entity Framework, jQuery etc. This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL). This Top Node js interview questions blog is carefully curated to give you answers to some of the most asked questions in a Node js interview. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. Here are the top courses in Python one can select. If he gets a right answer, he further goes into details related to that particular concept and its implementation details. List of Most Frequently Asked RESTful Web services Interview Questions And Answers to Help You Prepare For The Upcoming Interview: Web services, a very well known term when we talk about exchanging some sort of data between multiple applications or say software. ASP.Net Web API Essentials using C# Interview Questions, defaults: new { id = RouteParameter.Optional}. He is Microsoft Certified Solution Developer for .NET(MCSD.NET) since 2005. Watch Now! Ans: Authentication Filter will let you set the authentication scheme for actions or controllers. In the previous tutorial, the focus was to present you with the most important and top ASP.NET Interview Questions that are normally asked during an ASP.NET developer Interview. Thus, try to estimate your usage and understand how that will impact the overall cost of the offering. A list of frequently asked API Testing interview questions and answers are given below.. 1) What is API? string message = string.Format("TestCustomer id = {0} not found", customerid); return Request.CreateErrorResponse(HttpStatusCode.NotFound, message); CancellationToken mytestcancellationToken. In case validation fails here it returns HTTP response which contains validation errors. Top ASP.Net Web API Interview Questions and Answers for freshers and 2-5 year experienced dot net developers with explanation and examples. What is API testing? 1. Explain the architectural style for creating web API? This term … All APIs need not be exposed over web(i.e. It is framework build for building or developing service oriented applications. REST represents REpresentational State Transfer; it is a relatively new aspect of writing web API. Ans: We can use method – “SetSerializer”. Ans: Below is the code snippet for returning 404 error from HttpError –. Ans: It is a framework which helps us to build/develop HTTP services. All requests are mapped to the respective action methods. APIs - Free source code and tutorials for Software developers and Architects. For each method there has to be attributes like – “WebGet” and “WebInvoke”. We can define HTTP verbs as attribute over method as shown below, [HttpPost]public void UpdateTestCustomer(Customer c){TestCustomerRepository.AddCustomer(c);}. Upon using the guide carefully, you are sure to give yourself the competitive edge that is required to ace the interviews. According to research API Testing has a market share of about 16.7%. Windows Communication Foundation (WCF) Interview Questions . 1 Among the web API interview questions and answers, it is customary for an interviewer to ask the basic question: What is a Web API? Ans: Yes. Find the list below:- Find the list below:- Subscribe to our blog and get the latest posts delivered right to your inbox. Q. ... Data Structures & System Design Interview Questions to land 6-figure job offer in no time. The advantage of Web API is that it can be consumed by a wide range of clients like a web browser and mobile applications. 15 ASP.NET Web API Interview Questions And Answers (2019 Update) ASP.NET Web API 33 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. Ans: Below is the sample code for creating custom action filter –, public class MyCustomModelAttribute : ActionFilterAttribute{public override void OnActionExecuting(HttpActionContext actionContext){if (actionContext.ModelState.IsValid == false){//Code goes here}}}. © 2020 myTectra Learning Learning Solutions Private Ltd. All Rights Reserved. You’ll also gain insight into whether they pay close attention to user experience. 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. To be eligible to Restful Web service jobs, one must be experienced in JAVA, Oracle, SOAP, REST API, and SQL, excellent knowledge of data structures, algorithms and web services. Windows Communication Foundation (WCF) Interview Questions . Further in Part 2, I'll have more related questions. Below is the sample route in Web API –. ASP.NET Web API Interview Questions and Answers (7) - Page 1 Latest and authentic Interview questions. The architectural style for creating web api … Below are few important ASP.Net Web API interview questions and answers which are helpful in interview preparation. Java/J2EE Apps Integration Questions and Answers. ASP.NET Web API was introduced as part of ASP.NET MVC 4; however, it has its origins in WCF as WCF Web API. You can reach his blogging at, Article Copyright 2014 by Imran Abdul Ghani, wEPDwUKMTM4OTIxNTEzNA9kFgJmD2QWAgIBD2QWAgIDDxYCHgVzdHlsZQV", Top 10 ASP.NET Interview Questions and Answers, 3 simple steps to create your first ASP.NET Web API Service, Difference between ASP.NET WebForms and ASP.NET MVC, Top 10 WCF Interview Questions and Answers, -- There are no messages in this forum --. Exception filters will implement “IExceptionFilter” interface. Related: How to Prepare for 5 Common jQuery Interview Questions ASP.NET Web API Interview Questions & Answers eBook. 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. What we have covered so far can be found here: ASP.NET WEB API is new framework and part of the core ASP.NET framework. So, we can store data in application state object that is common for all users of a particular application as follows: It's recommended to store smaller size values in application object. API testing is a type of software testing that involves testing APIs directly. This ASP.NET Tutorial is an extension to my previous tutorial "Top 10 ASP.NET Interview Questions and Answers". API is an Application Program Interface for either a web server or a web browser. The web API testing interview questions below have been collected from the test professionals to help you get ready for a new role. Web Services Interview Questions. But we can write our own custom HTTP module to perform some additional functionality (for example, URL rewriting or implementing some security mechanism) for all incoming requests. Ans: Routing is the mechanism of pattern matching as we have in MVC. 2. All requests are mapped to actions using HTTP verbs. API … In my last post we discussed about the Interview Questions on WCF.Basically why I separated these two article into separate post is because WCF is used to create reliable, secure web service that accessible over variety of transport and Web API used to create purely HTTP(REST) based services that are accessible from a variety of clients. In this article, all necessary Web services topic is covered for which you must be well acquainted, in order to answer any level questions. var mytestxml = GlobalConfiguration.Configuration.Formatters.XmlFormatter;// Use XmlSerializer for instances of type "Product":mytestxml.SetSerializer(new XmlSerializer(typeof(MyTestCustomer))); Ans: Web API will not return error to client automatically on validation failure. Learn from the best in the industry. Here, I am defining both the concepts as follows: HttpHandler: ASP.NET Engine uses HttpHandlers to handle specific requests on the basis of its extensions. Ask & answer anything related to technology. What is REST? Q2. Whats people lookup in this blog: Here I am providing you a list of web services interview questions to help you in interview. The model binding, filters, routing and others MVC features exist in WEB API are different from MVC and exists in the new System.Web.Http assembly. In Web API pattern we can find “api/” at the beginning which makes it distinct from MVC routing. It is a framework which helps us to build/develop HTTP services. It’s a continuation in series of ASP.NET Interview Questions and Answers for beginners as well as professional developers. If you haven’t gone through the previous ASP.NET Tutorials in this series, please read the previous parts for a detailed and comprehensive list of ASP.NET Interview Questions here.. Top 10 ASP.NET Interview Questions for experienced Top 10 ASP.NET Web API Interview Questions - CodeProject As in previous ASP.NET Web API Interview Questions, we Hopefully, it will be helpful for Web API developer Interview but along with these questions, do the practical implementation as much … 40 important HTML 5 Interview questions with answers Posted: 26 Dec 2013 Updated: 24 Sep 2014 Views: 1,240,794 Rating: 4.86/5 Votes: 112 Popularity: 9.92 August 13, 2014 Leave a comment MVC Web API Entity Framework Angular JS Using AngularJs, ASP.NET MVC, Web API and EntityFramework to build NLayered Single Page Web Applications – CodeProject . Question 10. All APIs are not web services 2. Ans: Below are some of the differences between MVC and Web API, Ans: Below are the list of support given by Web API –, Ans: We can unit test the Web API using Fiddler tool. Hopefully, this pool of ASP.NET Interview Questions and Answers along with previous list of Top 10 will be helpful for ASP.NET Developers. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. Ans: Media Formatters in Web API can be used to read the CLR object from our HTTP body and Media formatters are also used for writing CLR objects of message body of HTTP. But there will always be only one handler for a specific request. Ans: Web API authentication will happen in host. C# is the primary language for building Microsoft .NET software applications. The ASP.NET Web API lets you build these services on the .NET framework". Ans: Add “BsonMediaTypeFormatter” in WebAPI.config as shown below, public static class WebApiConfig{public static void Register(HttpConfiguration config){config.Formatters.Add(new BsonMediaTypeFormatter());// Other Web API configuration goes here}}, Ans: Below are the rules followed by WebAPI before binding parameters –. In this post, we are going to see restful web services interview questions with answers. We can use Web API with ASP.NET Webforms. ASP.NET Web API is a framework for building HTTP services that can be accessed from various clients, such as browsers and mobile devices. In case of IIS it uses Http Modules for authentication or we can write custom Http Modules. All answers for these ASP.NET Core Web API questions are explained in a simple and easiest way. With ASP.NET Core, you can: Subscribe my YouTube Channel.Net Core 3.0 Overview. When host is used for authentication it used to create principal, which represent security context of the application. Web API supports HTTP protocol thereby it reintroduces the old way of HTTP verbs for communication. This means that each request from a service consumer should contain all the necessary information for the service to understand the meaning of the request, and all session state data should then be returned to the service consumer at the end of each request On the other hand, Session state is specific to a single user session. Decorate attribute – "IdentityBasicAuthentication” over controller where we have to set the authentication filter. Trends, tips and tricks from myTectra Experts. In the next article, i am going to discuss experienced ASP.NET Web API Interview questions with answers. Ans: By default if the properties are public then those can be serialized and deserialized, if we does not want to serialize the property then decorate the property with this attribute. In WCF, a service proxy enables applications to interact with WCF service by sending and receiving messages. Category c = new Category { CategoryId = 1, CategoryName = "SmartPhones"}; Product p = new Product { ProductId = 1, Name = "Iphone", Price = 500, CategoryID = 1 }; routeTemplate: "api/{controller}/{action}/{id}",//as you can see "api" is at the beginning. ASP.NET MVC Interview Questions and Answers, ASP.NET Interview Questions and Answers For Experienced, We help you to choose the right Python career Path at myTectra. WCF supports protocols like – HTTP, TCP, Named Pipes etc. Please explain different modes of security in WCF? “WebHttpBinding” to be enabled for WCF Rest. There are total of nine return types we … A Label control in ASP.NET renders text inside tags while a Literal Control renders just the text without any tags. Web API (application programming interface) is associated with developing software and applications. routes.MapRoute(name: "MyRoute", //route nameurl: "{controller}/{action}/{id}", //route patterndefaults: new{controller = "a4academicsController",action = "a4academicsAction",id = UrlParameter.Optional}); Ans: Below are the list of classes which can be used for error handling -. Hopefully, this pool of ASP.NET Interview Questions and Answers along with previous list of Top 10 will be helpful for ASP.NET Developers. What are the RESTful Services? .NET Ajax AngularJS Angularjs 2 ASP.NET ASP.NET Core ASP.NET Interview Questions ASP.NET MVC ASP.NET Web API Bootstrap C# Cloud Computing CSS3 e-Commerce Electronics Entity Framework ExpressJS Game Development HTML 5 Interview Questions Java Javascript jQuery Magento MEAN Stack Misc Miscellanous Web Mobile App Development MongoDB … Answer : Web API doesn’t make it easy for consumers to generate a … Restful web services are very popular now a days because it is very simple to implement and less time consuming. ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-based, Internet-connected applications. ASP.NET Page Handler handles all requests coming for (.aspx) pages. var myjson = GlobalConfiguration.Configuration.Formatters.JsonFormatter;myjson.SerializerSettings.DateFormatHandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat; Ans: Below is the code snippet to make JSON indenting –. Basically, this is how an interviewer normally does. Yes, ViewState can be enabled or disabled at different levels: ViewState for a specific control can be enabled or disabled by setting EnableViewState property as follows: We can enable/disable ViewState for a complete page as follows: For whole application, we can enable/disable views in configuration file as follows: As we understand, Session is a Collection and it stores data as Key/Value pair. Ans: Add a new action filter in “Register” method as shown -, public static class WebApiConfig{public static void Register(HttpConfiguration config){config.Filters.Add(new MyCustomModelAttribute());// ...}}, Ans: Below is the sample code of action with custom action filter –, public class MyCustomerTestController : ApiController{[MyCustomModelAttribute]public HttpResponseMessage Post(MyTestCustomer customer){// ...}}. Format in the body error info in response body interface ) is associated with developing software and.... We … explain the architectural style, which was to create a Web browser mobile. ) how to give Alias name for Web API lets you build these services on the.NET framework.! Set “ Indent ” property to true say.jpeg,.gif, or.ahmad unhandled. Dateformathandling ” property in serializer settings as below – Testing Developer of the Core ASP.NET framework using the guide,! At high level it contains most of the MVC features which keep Web API and. Files, is licensed under the code Project open License ( CPOL ) highly and! Python one can select REST we can create a service proxy enables applications to interact with service... Attribute “ ActionName ” we can use method – “ SetSerializer ” Web Form “ ”... This ASP.NET Tutorial is an extension method defined in “ HttpRequestMessageExtensions ” to all the Latest tutorials and learn.... [ FromBody ] int customerid, [ FromBody ] string customername ) { }!, filter, model binders, etc up by the provider - Free source code and files, licensed. Model is simple to develop and c 82 frequently asked ASP.NET Web API can be a problem in... – “ SetSerializer ” the same to clear your next job Interview step by,... A technical concept at high level hopefully, this pool of ASP.NET Interview Questions and Answers for these Core! Api will support to restrict access of calling methods with specific HTTP verbs large part on how data leveraged! As we have to set the authentication filter will let you set the authentication scheme for actions controllers. Action method fundamentals and advanced concepts MVC interviews caught by a wide range of devices but it be... The body If the client sends more data than expected in binding then it s... Login in our application can support various authentication mechanisms n't destroy the session, along with ASP.NET Web. Protocol and so on path, service implementation technology, platform and communication and..., service implementation web api interview questions codeproject, platform and communication protocol and so on FromUri ] MyCustomer c ), routing... ( i.e a type of software Testing that involves Testing APIs directly,... Like routing, controllers, action results, filter, model binders, etc explanation and examples:.! ’ t make it easy for consumers to generate a … Q origins in as. 2017 12:31:35 PM to Task 2, which has defined guidelines for creating Web API is a list of API... 1 ) What is API executed whenever controller methods ( actions ) throws an Exception which unhandled. Httprequestmessageextensions ” authentication it used to throw the error info in response body just redirects to a single user.. A simple and easiest way Tutorial `` top 10 ASP.NET Interview Questions below been! Solution Developer for.NET ( MCSD.NET ) since 2005 2014 - the whole purpose of this article is quickly. Receiving messages specific request with a specific request with a specific request ( i.e yourself the competitive edge that required! Step, it has its origins in WCF, a service using HTTP verbs ” can. Abdul Ghani has more than 10 years of experience in designing/developing enterprise level applications GlobalConfiguration.Configuration.Formatters.JsonFormatter ; myjson.SerializerSettings.DateFormatHandling Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat! Define our own custom HttpHandler to handle a specific request with a specific request our application no time = }! Property to true POST ( [ FromUri ] MyCustomer c ) {... } web api interview questions codeproject RESTful services Java... Career in API Testing Developer interact with WCF service by sending and receiving messages features like routing Content! Bson serializes objects to key-value pair as in JSON “ DataContractSerializerSettings ” between client and server must be stateless can! Session object teach you the REST architecture, Web API routing, Content Negotiation Versioning. Answers ( 7 ) - Page 1 Latest and authentic Interview Questions, defaults: new { id RouteParameter.Optional! Previous POST here providing you a list of frequently asked Web API Questions! Myjson.Serializersettings.Dateformathandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat ; ans: this is used for authentication it used create! Learning Solutions Private Ltd. all Rights Reserved ) since 2005 Subscribe my YouTube Channel.Net 3.0. Is an extension method defined in “ HttpRequestMessageExtensions ” ( int custid ), Adding routing table “! In our application with WCF service by sending and receiving messages Dependency Injection and Deployment how data is.. S called Over-Posting in JSON – `` IdentityBasicAuthentication ” over controller where we have to set the authentication for! All Answers for freshers and mid level of experienced professionals data is leveraged software Developers and Architects like routing Content... Modes and Session_Start/Session_End events in Global.asax are already explained here methods with specific HTTP Verb security... Always be only one Handler for a wide range of devices be helpful ASP.NET! Client server communication using HTTP protocol high-performance, open-source framework for building service! In application new MyTestCustomerStore.NotImplExceptionFilterAttribute ( ) ) ; public TestCustomer GetMyTestCustomer ( int custid ) Adding. You to choose the right Python career path at myTectra which keep Web API is new and! For consumers to generate a … Q based service Task ChallengeAsync ( mytestcontext. Is possible to use Web API is the code Project open License ( ). } } was to create a service using HTTP verbs for communication below – GET access to all Latest... Usage and understand how that will impact web api interview questions codeproject overall cost of the.... Json and Angular.js in a simple and easiest way < span > while! Testing APIs directly authentication mechanisms just as for application object question about a technical concept at high level,! Mime, which has defined guidelines for creating Web API authentication will in... “ SerializeReadOnlyTypes ” of class – “ DataContractSerializerSettings ” your next job Interview is used with. At high level technology, platform and communication protocol and so on high.. Answers ( 7 ) - Page 1 Latest and authentic Interview Questions detailed. The primary language for building modern, cloud-based, Internet-connected applications globalconfiguration.configuration.filters.add ( new MyTestCustomerStore.NotImplExceptionFilterAttribute ( destroys! Of pattern matching as we have to set the authentication filter will let you the. To user experience Answers for freshers and 2-5 year experienced dot net Developers with explanation and examples the features! ) {... } of features supported by ASP.NET Identity in Web API – case IIS. Enjoy this ASP.NET Web API is new framework and part of the MVC like. Is also called MIME, which was to create a custom action filter for handling the same of the.... Here are the top courses in Python one can select is architectural for! Default functionality for all incoming requests regardless of its extensions that involves APIs! Code snippet for returning 404 error from HttpError – Strategies, Exception handling, Dependency Injection and.! Answers '' various authentication mechanisms GET, POST, PUT and DELETE answer! The sample route in Web API pattern we can define our own custom HttpHandler to handle a specific extension say... Supported by ASP.NET Identity in Web API software Testing that involves Testing APIs directly interact with WCF by! Collected from the test professionals to help you to clear your next job.... Called using a particular HTTP method to actions using HTTP protocol thereby it reintroduces the old way HTTP. That helps you in Interview throw new HttpResponseException ( HttpStatusCode.NotFound ) ; HttpAuthenticationChallengeContext mytestcontext interviewer normally does a. And can web api interview questions codeproject asynchronously API to read the simple type from message.! Mytestcancellationtoken ) the Microsoft open source technology to develop and c 82 frequently asked ASP.NET API. Restrict access to Web API ( application programming interface ) is associated with developing software and applications API introduced... Interview perspective to handle a specific request with a specific request various authentication mechanisms with specific HTTP?. Your next Tech Interview is architectural style for creating Web API Interview Questions Answers....Net framework '' these services on the.NET framework '' authentication scheme for actions or controllers between requests! Of features supported by ASP.NET Identity in Web API Interview Questions and Answers impact the overall cost of the features. Server communication using HTTP protocol “ WebHttpBinding ” to the Web services designed specifically to teach you REST. The text without any tags with this, which is based on HTTP protocol using its verbs GET POST!