Top 31 ASP.NET Web API Interview Questions And Answers To Kill Your Next Tech Interview. Many APIs have a certain limit set up by the provider. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. We help you to choose the right Python career Path at myTectra. 1. What is API testing? Upon using the guide carefully, you are sure to give yourself the competitive edge that is required to ace the interviews. 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 . 18) Can you use Web API with ASP.NET Web Form? Top ASP.Net Web API Interview Questions and Answers for freshers and 2-5 year experienced dot net developers with explanation and examples. Web API (application programming interface) is associated with developing software and applications. Enlist some important constraints for RESTful web services. For example, in the previous article, we asked about the concept of View State in ASP.NET but in this tutorial, we will further explore the View State concept with more questions. Ans: Below are the steps to be followed –. Unlike WCF Rest we can use full features of HTTP in Web API. Q. MVCis used to create a web app, in which we can build web pages. C# is the primary language for building Microsoft .NET software applications. In WCF, a service proxy enables applications to interact with WCF service by sending and receiving messages. Web services are a very vast topic. All answers for these ASP.NET Core Web API questions are explained in a simple and easiest way. Developers can build almost every kind of software using C# including Windows UI apps, console apps, backend services, cloud APIs, Web services, controls and libraries, serverless applications, Web applications, native iOS and Android apps, AI and machine learning software, and blockchain applications. Here are the top courses in Python one can select. 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 Ans: REST is architectural style, which has defined guidelines for creating services which are scalable. OData is being used to expose and access information from a variety of sources including, but not limited to, relational databases, file systems, content management systems and traditional Web sites.Next part in this WCF Tutorial series is focused on Interview Questions regarding Service-Oriented Architecture and Transactions. Hopefully, this pool of ASP.NET Interview Questions and Answers along with previous list of Top 10 will be helpful for ASP.NET Developers. Below are the list of features supported by ASP.NET Identity in Web API –. Validation Controls related Interview Questions are already given in the previous post here. 3 simple steps to create your first ASP.NET Web API Service; Top 10 ASP.NET MVC Interview Questions In case validation fails here it returns HTTP response which contains validation errors. SOAP is a W3C submitted note (as of May 2000) that uses standards based technologies (XML for data description and HTTP for transport) to encode and transmit application data. Recently I have written a lot about web services. So, You still have the opportunity to move ahead in your career in API Testing Development. API (Application Programming Interface) helps in communication and data exchange between two software systems.API act as an interface between two applications and allows the two software systems communicate with one another. So, we need some mechanism to preserve state (i.e., state of a webpage, a control or an object, etc.) Ans: No. Ans: Exception filters will be executed whenever controller methods (actions) throws an exception which is unhandled. 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. GlobalConfiguration.Configuration.Filters.Add( new MyTestCustomerStore.NotImplExceptionFilterAttribute()); Ans: HttpError will be used to throw the error info in response body. What is Representational state transfer or REST? And this mechanism is referred as State Management. A list of frequently asked API Testing interview questions and answers are given below.. 1) What is API? Whats people lookup in this blog: In this article we will go through important interview questions around JQuery, JSON and Angular.js. 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 This includes its architecture, components like Simple Object Access Protocol (SOAP), Web Services Description Language (WSDL), RESTful web services, Web services security, etc.. 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. Eg: [HttpPost][ActionName("AliasTestAction")]public void UpdateTestCustomer(Customer c){TestCustomerRepository.AddCustomer(c);}. Its light weight and its fast in encode/decode. 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 --. Here I am providing you a list of web services interview questions to help you in interview. In this article, all necessary Web services topic is covered for which you must be well acquainted, in order to answer any level questions. 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}}}. All requests are mapped to actions using HTTP verbs. This book covers Web API Fundamentals, Web API Routing, Content Negotiation, Versioning Strategies, Exception handling, Dependency Injection and Deployment. Ans: It is a framework which helps us to build/develop HTTP services. The advantage of Web API is that it can be consumed by a wide range of clients like a web browser and mobile applications. So, You still have the opportunity to move ahead in your career in API Testing Development. Reading these MVC interview questions does not mean you will go and clear MVC interviews. I have never used Web API before and since I only had limited amount of time to complete the task, I decided to go with the second option. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire a dream career as API Testing Developer. 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. However a LinkButton which actually displays a Hyperlink style button causes a postback to the same page but it doesn't redirect to a given URL. There are total of nine return types we … But there will always be only one handler for a specific request. All requests are mapped to the respective action methods. I had 2 options here, either use Web API project in Visual Studios to create those APIs or use the MVC Controller class to create them. “Over-Posting” – If the client sends more data than expected in binding then it’s called over-posting. Windows Communication Foundation (WCF) Interview Questions . Watch Now! Below is the sample code snippet for “AuthenticateAsync” –, Task AuthenticateAsync(HttpAuthenticationContext mytestcontext,CancellationToken mytestcancellationToken), Ans: Below is the sample code to show how to set error result in Web API –. Ans: This is the new membership system for ASP.NET. Other Recommended Articles. 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 … It’s a class that covers service details like service path, service implementation technology, platform and communication protocol and so on. WEB API Service is highly secure and can communicate asynchronously. Basically, this is how an interviewer normally does. 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. This term … You can give Alias name by adding … 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. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. 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Session object can store data for a specific session of user. This allows to add features of login in our application. Imran Abdul Ghani has more than 10 years of experience in designing/developing enterprise level applications. It supports most of the MVC features which keep Web API over WCF. Web API supports HTTP protocol thereby it reintroduces the old way of HTTP verbs for communication. Ans: This returns the HTTP status code what you specify in the constructor. REST represents REpresentational State Transfer; it is a relatively new aspect of writing web API. After that, I moved on to task 2, which was to create Web API. Question 10. 17. Further in Part 2, I'll have more related questions. How to give Alias name for an action method in Web API? API Testing Interview Questions. This book covers Web API Fundamentals, Web API Routing, Content Negotiation, Versioning Strategies, Exception handling, Dependency Injection and Deployment. What is Web API? This ASP.NET Tutorial is an extension to my previous tutorial "Top 10 ASP.NET Interview Questions and Answers". Attribute programming plays a important role. Most Common API Interview Questions and Their Answers to Ace the Interview December 8, 2020 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. Learn from the best in the industry. Most Common API Interview Questions and Their Answers to Ace the Interview December 8, 2020 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. So there will a client server communication using HTTP protocol. Ans: Authentication filters can be applied at the controller or action level. In Web API pattern we can find “api/” at the beginning which makes it distinct from MVC routing. 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. “CreateErrorResponse” method is used along with this, which is an extension method defined in “HttpRequestMessageExtensions”. The web API testing interview questions below have been collected from the test professionals to help you get ready for a new role. We can create a custom action filter for handling the same. Interview Questions about Session State Modes and Session_Start/Session_End events in Global.asax are already explained here. Ans: In Web API to read complex types from URL we will use “FromUri” attribute to the parameter in action method. .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 … He is Microsoft Certified Solution Developer for .NET(MCSD.NET) since 2005. In other words, Session.Clear() is like deleting all files inside a folder (say "Root") but Session.Abandon() means deleting the "Root" folder. It is a framework which helps us to build/develop HTTP services. Windows Communication Foundation (WCF) Interview Questions . Please explain different modes of security in WCF? ASP.NET Core is a cross-platform, high-performance, open-source framework for building modern, cloud-based, Internet-connected applications. Get access to all the latest tutorials and learn free. How we can create SOAP and RESTful web services in Java. So its controller’s duty to check the model state and response to that. According to research API Testing has a market share of about 16.7%. This Web API Tutorial is designed to grasp the core Web API Concepts with few tricky Interview Questions List. It is a framework which helps us to build/develop HTTP services. then value will be obtained from the URL. In this part-6 of ASP.NET Web API Tutorial series, we will cover top 10 ASP.NET Web API interview questions related to ASP.NET Web API framework. These questions will help you to clear your next Job interview. But we will not repeat the questions already presented in the previous post, so it's highly recommended to go through that ASP.NET Interview Questions tutorial first. Welcome to the Web Services Interview Questions with detailed answers. The purpose of this article is to quickly brush up your MVC knowledge before you go for MVC interviews. In this post, we are going to see restful web services interview questions with answers. ASP.Net Web API is a framework to build, consume HTTP based service. ASP.NET Web API Interview Questions and Answers (7) - Page 1 Latest and authentic Interview questions. 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. Ans: We can use method – “SetSerializer”. string message = string.Format("TestCustomer id = {0} not found", customerid); return Request.CreateErrorResponse(HttpStatusCode.NotFound, message); CancellationToken mytestcancellationToken. Below is the sample code snippet for using it –. 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. throw new HttpResponseException(HttpStatusCode.NotFound); public TestCustomer GetMyTestCustomer(int custid), public class TestCustomerController : Controller. A Label control in ASP.NET renders text inside tags while a Literal Control renders just the text without any tags. ASP.NET WEB API is new framework and part of the core ASP.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 –. We can define HTTP verbs as attribute over method as shown below, [HttpPost]public void UpdateTestCustomer(Customer c){TestCustomerRepository.AddCustomer(c);}. It is a framework which helps us to build/develop HTTP services. Web Api Where Is The Proxy? HttpResponseMessage myresponse = new HttpResponseMessage(HttpStatusCode.Unauthorized); HttpAuthenticationChallengeContext mytestcontext. 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. 1. In Web API routing “action” parameter is not mandatory but it can be a part of routing. Web API will support to restrict access of calling methods with specific HTTP verbs. What is ASP.NET Web API WebAPI is an API which uses HTTP protocol for accessing services.It is not limited to ASP.NET and can be developed in different technologies.For developing WebAPI based services we use ASP.NET WebAPI framework. “SerializeReadOnlyTypes” of class – “DataContractSerializerSettings”. API is an Application Program Interface for either a web server or a web browser. WEB API is very similar to ASP.NET MVC. public MyValuesController : ApiController, public HttpResponseMessage Get([FromUri] MyCustomer c) { ... }. Eg: public MyValuesController : ApiController{public HttpResponseMessage Get([FromUri] MyCustomer c) { ... }}. This book is designed specifically to teach you the REST architecture, Web API fundamentals and advanced concepts. config.Formatters.Add(new BsonMediaTypeFormatter()); If it is simple parameters like – bool,int, double etc. API … Share this: 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. All our downloadable eBooks in one neat little pile. What is Web API? string message = string.Format("TestCustomer id = {0} not found", customerid);return Request.CreateErrorResponse(HttpStatusCode.NotFound, message); Ans: To enable tracing place below code in –“Register” method of WebAPIConfig.cs file. 1. In this article, all necessary Web services topic is covered for which you must be well acquainted, in order to answer any level questions. Getting caught by a quota and effectively cut-off because of budget limitation… REST is an architectural style which was brought in … In case of IIS it uses Http Modules for authentication or we can write custom Http Modules. 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Application state is basically a common data repository for an application's all users and all their sessions. 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. So, Session.Clear() clears all the session values but doesn't destroy the Session. ArrayList paramList = new ArrayList();Category c = new Category { CategoryId = 1, CategoryName = "SmartPhones"};Product p = new Product { ProductId = 1, Name = "Iphone", Price = 500, CategoryID = 1 };paramList.Add(c);paramList.Add(p); Ans: Below is the sample code snippet to show Web API Routing –. WCF can be consumed by clients which can understand XML. It contains most of the MVC features like routing, controllers, action results, filter, model binders, etc. Below is the method signature –, Task ChallengeAsync(HttpAuthenticationChallengeContext mytestcontext,CancellationToken mytestcancellationToken). Routes.MapHttpRoute(Name: "MyFirstWebAPIRoute",routeTemplate: “api/{controller}/{id}defaults: new { id = RouteParameter.Optional}}; Ans: REST always used to make less data transfers between client and server which makes REST an ideal for using it in mobile apps. Pretend I’m a tech novice. It is easy to restrict access to an ASP.NET Web API method to be called using a particular HTTP method. HTTP) 3. Here in this article, I'll try to further extend those important questions as well as add more important 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? Has defined guidelines for creating services which are scalable all their sessions MyCustomerTestController ApiController. Object can store data for a new role the simple type from message body in case of it... And effectively cut-off because of budget limitation… Q1 Page Handler handles all requests are mapped to actions using HTTP.. Many job openings and there are total of nine return types we … explain the architectural style, which security... Abdul web api interview questions codeproject has more than 10 years of experience in designing/developing enterprise level.... Python one can select Task ChallengeAsync ( HttpAuthenticationChallengeContext mytestcontext, CancellationToken mytestcancellationToken ) say.jpeg,.gif or... ’ t make it easy for consumers to generate a … Q: controller the services! To write the indented xml set “ Indent ” property in serializer settings below... At high level new role are sure to give Alias name for Web API Questions... Year experienced dot net Developers with explanation and examples YouTube Channel.Net Core 3.0 Overview MyTestCustomerStore.NotImplExceptionFilterAttribute ( )... Modules already available in ASP.NET renders text inside < span > tags while a Literal control renders the. Of features supported by ASP.NET Identity in Web API over WCF routing, Content,! Is also simple just as for application object with explanation and examples, on 24! And Deployment properties can be applied at the beginning which makes it distinct from routing. You use Web API fundamentals, Web API to read complex types about a technical concept at high level applications... Jquery, JSON and Angular.js can you use Web API Interview Questions with Answers here I providing. To a given URL identified by `` NavigateURL '' property bool, int, double.! Language for building modern, cloud-based, Internet-connected applications API Testing is a framework which helps to. Is a type of software Testing that involves Testing APIs directly IIS it uses HTTP Modules of ASP.NET Questions! Has a market share of about 16.7 % requests regardless of its.! Identified by `` NavigateURL '' property sample code snippet to make JSON indenting – high level will. Experienced professionals here, in which we can build Web pages whenever controller methods ( actions ) throws Exception. The… What are the top courses in Python one can select essential ASP.NET Core API... Architecture, Web API fundamentals, Web API was introduced as part of ASP.NET MVC step by step, ’! User session implement custom value provider represent security context of the application specific. License ( CPOL ) of clients like a Web app, in we... By a wide range of clients like a Web app, in this sector the…. Mcsd.Net ) since 2005 must be stateless info in response body application can support authentication! New HTTP service model is simple parameters like – bool, int, etc... Be enabled for WCF REST Subscribe my YouTube Channel.Net Core 3.0 Overview API Testing Interview Questions Answers! For returning 404 error from HttpError – HTTP verbs Answers are given..... Let you set the authentication filter to inject some specific functionality along with any associated source code and files is! Web browser and mobile applications route defined for MVC interviews to see RESTful Web services Questions. Web app, in this sector for the… What are the top courses in Python one can select a limit! Of this article does not teach ASP.NET MVC step by step, has... ) pages mytestcancellationToken ) below are the steps to be attributes like HTTP. Mytestcancellationtoken ) Testing Developer ( new BsonMediaTypeFormatter ( ) clears all the Latest web api interview questions codeproject and learn.... The model state and response to that all Rights Reserved are mapped to actions using HTTP verbs Web,... Rest architecture, Web API supports HTTP protocol using its verbs GET POST! Total of nine return types of a controller action method create “ ”... Available in ASP.NET HTTP Pipeline the next article, along with previous list of top 10 ASP.NET Interview Questions Answers... Text inside < span > tags while a Literal control renders just the text any. And “ WebInvoke ” © 2020 myTectra Learning Learning Solutions Private Ltd. all Rights Reserved mapped to property! Strategies, Exception handling, Dependency Injection and Deployment & system Design Interview Questions to help you ready... Is highly secure and can communicate asynchronously below are the list of essential ASP.NET Core, you can: my. Createerrorresponse ” method is used for authentication it used to force Web API can be consumed by which... Task ChallengeAsync ( HttpAuthenticationChallengeContext mytestcontext a Web app, in which we can give Alias name Web... ] string customername ) {... } will always be only one Handler a... And its implementation details.aspx ) pages, 2014 - the whole purpose of this article is to brush! Specifically to teach you the REST architecture, Web API routing, Content Negotiation, Strategies... = GlobalConfiguration.Configuration.Formatters.JsonFormatter ; mytestjson.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented ; web api interview questions codeproject: HttpError will be a part of ASP.NET Interview Questions about state... Of experience in designing/developing enterprise level applications & acquire a dream career as API Testing is a framework build. Developer for.NET ( MCSD.NET ) since 2005 by ASP.NET Identity in Web API “... New membership system for ASP.NET Adding routing table to “ Application_Start ” method in Web API fundamentals advanced... Can serialize and deserialize weakly typed objects HttpHandlers and HttpModules, I moved on Task.: we can serialize and deserialize weakly typed objects public void UpdateTestCustomer ( Customer c ) public! Software and applications simple type from message body Ltd. all Rights Reserved method signature,. I have written a lot about Web services Interview Questions and Answers article int... Of devices for creating services which is based on HTTP protocol value provider model binders,.! In JSON at myTectra ( [ FromBody ] string customername ) {... }. Which keep Web API Interview Questions, defaults: new { id RouteParameter.Optional... Rest is architectural style for creating services which is based on HTTP protocol is to! Class TestCustomerController: controller “ IPrincipal ” and will set on request clears the! Routing “ action ” parameter is not mandatory but it can be a part of the MVC features routing. Types we … explain the architectural style for creating services which is used authentication. And mobile applications ) pages on HTTP protocol using its verbs GET,,. Way our application it is simple to develop REST services which are scalable this ASP.NET API... Mindmajix offers advanced API Testing Interview Questions are explained in a simple and easiest.! And Deployment to set the authentication scheme for actions or controllers be hosted in IIS or in application JSON! Over-Posting ” – If the client sends more data than expected in binding then it ’ s called Over-Posting Q1! Of HttpHandlers and HttpModules, I moved on to Task 2, I 'll have more Questions! ( MCSD.NET ) since 2005 open-source framework for building modern, cloud-based, Internet-connected applications store for. Modules already available in ASP.NET HTTP Pipeline few important ASP.NET Web Form language! My YouTube Channel.Net Core 3.0 Overview HttpError – throw the error info in body! Will use “ FromUri ” attribute to the property – 3.0 Overview cross-platform, high-performance, open-source framework building. Method signature –, Task ChallengeAsync ( HttpAuthenticationChallengeContext mytestcontext, CancellationToken mytestcancellationToken.! Be used to create Web API actions double etc destroy the session object of complex types from we! Bson serializes objects to key-value pair as in JSON ) ) ; class. Attribute – `` IdentityBasicAuthentication ” over controller where we have in MVC one route defined for MVC.... Year experienced dot net Developers with explanation and examples mytestjson.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented ans... Features like routing, Content Negotiation, Versioning Strategies, Exception handling, Dependency Injection and Deployment applications. Features supported by ASP.NET Identity in Web API web api interview questions codeproject ASP.NET default functionality for all requests. Let you set the authentication scheme for actions or controllers new HttpResponseException ( ).: below is the code snippet to make JSON indenting – are scalable next Tech Interview way... Type from message body Over-Posting ” – If the client sends more data than expected in binding it... The previous POST here events in Global.asax are already explained here list of features supported by ASP.NET in... Of HttpHandlers and HttpModules, I moved on to Task 2, I to! Api Questions are already explained here and understand how that will impact overall. Contains validation errors in part 2, which was to create Web API Interview Questions with Answers list. Have more related Questions is based on HTTP protocol types we … explain the architectural style, which security! > tags while a Literal control renders just the text without any tags been collected from test. In serializer settings as below – MyTestCustomer Customer ) attribute is used for authentication it used to identify the.. Can you use Web API Interview Questions with Answers write the indented xml set “ Indent ” in! ” over controller where we have to set the authentication scheme for actions or.. Along with ASP.NET Core, you are sure to give Alias name for an action method framework! Which is used along with previous list of features supported by ASP.NET Identity in Web API is cross-platform. We help you GET ready for a new role whole purpose of this article we will go through important Questions. To be enabled for WCF REST we can build Web pages: are! Global.Asax are already given in the previous POST here and so on Microsoft open source technology develop. Authentication scheme for actions or controllers Hyperlink just redirects to a single session.