Uniform Interface: Allows a limited set of operation defined using the HTTP Verbs. In case, if you want a service that should support multiple transport protocol like HTTP, UDP, TCP, etc. Therefore, it reintroduces the traditional way of the HTTP verbs for communication. 1. 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. Windows Communication Foundation (WCF) Interview Questions . Web API sector has many job openings and there are many opportunities in this sector for the… Yes, we can consume ASP.NET Web API in the applications created using another language than .NET but that application must have access/supports to the HTTP protocol. 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. In fact, it is another way of building non-SOAP based services, i.e., plain XML or JSON string. If you are preparing for Web API Interviews then definitely you have to prepare this Web API Interview Questions. Two methods to pass the complex types in Web API –. Therefore, the client can interact with the service by using the HTTP verbs. Now, C# can be run on Mac, Linux/Unix and Windows using .NET Core. It focuses on system resources and how the state of the resource should be transported over HTTP protocol. Media-Type formatter is an abstract class from which JsonMediaTypeFormatter (handle JSON format) and XmlMediaTypeFormatter (handle XML format) class derived from. The level of difficulty is mixed and is appropriate for both beginners as well as experienced professionals. Answer : Web API doesn’t make it easy for consumers to generate a service client like a … REST is used to make fewer data transfers between client and server which make it an ideal for using it in mobile apps. Attribute programming is widely used for this functionality. 12) How do you construct HtmlResponseMessage? The ASP.NET Web API lets you build these services on the .NET framework". Other Considerations for Web API Interview Different Types of Questions. However, do not neglect to practice the other types of questions about your work history and projects you have previously worked on. Q #1) What is API Testing? MyTestCustomerStore.NotImplExceptionFilterAttribute()); REST represents REpresentational State Transfer; it is entirely a new aspect of writing a web app. This filter checks whether the user is authenticated or not. Ltd. We can also create the REST services with the WCF, but that requires lots of configuration. We can do Web API Versioning in the following ways: Exception handling is a technique to handle runtime error in the application code. 32) Name the tools or API for developing or testing web api? No, we can't return a view from ASP.NET Web API Method. Download PDF. It is possible to define HTTP verbs as an attribute to restrict access. Web API sector has many job openings and there are many opportunities in this sector for the… ASP.NET MVC is an open source and lightweight web application development framework from Microsoft. All answers for these ASP.NET Core Web API questions are explained in a simple and easiest way. This book is designed specifically to teach you the SOA architecture concepts along with WCF and ASP.NET Web This book covers SOA concepts, WS-* Standards, WCF features, Binding, message exchange Ans: API (Application Programming Interface) specifies how some software components should interact with other, in other words it’s a set of functions and procedures that allows the creation of applications which access the features or data of an application or operating system. HTTP Status Codes are grouped into five categories based upon the first number. 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. It totally depends upon the requirement. ASP.NET framework ships out with the .NET framework and is Open Source. The REST was first introduced in the year 2000 by Roy Fielding as part of his doctoral dissertation. Windows Communication Foundation is a framework used for building Service Oriented applications (SOA) and supports multiple transport protocol like HTTP, TCP, MSMQ, etc. 2. It is based on HTTP and easy to define, expose and consume in a REST-ful way. Here all examples are given in C# Programming language. 11) What is the biggest disadvantage of "Other Return Types" in Web API? Please enable Javascript to correctly display the contents on Dot Net Tricks! The re-usable code can be used in many places... What is ASP.NET MVC? No, ASP.NET Web API didn’t replace WCF Service as it is only used for creating RESTful Service i.e. 10) By default, Web API sends HTTP response with which of the following status code for all uncaught exception? Web API is the Microsoft open source technology for developing REST services based on HTTP protocol. The questions include both subjective and objective. Follow me @kansiris87 for technical updates.. Table of Contents In fact, even portable devices such as mobile devices can easily use Web API, which is undoubtedly the biggest adva… 16) How can we use Web API with ASP.NET Web Form? 82 Frequently Asked Web API Interview Questions and Answers. “CreateErrorResponse” method is can also use along with this, which is an extension method defined in “HttpRequestMessageExtension.”. WCF ships out with the .NET Framework. So, if you need to return a view from the controller class, then make sure to use or inherit the Controller class. In the below example, we requested the data from the server in JSON format. However, it can be used with ASP.NET Web Form. Web API can be consumed by any clients which support HTTP verbs such as GET, PUT, DELETE, POST. 47) What is the benefit of WebAPI over WCF? Web Api Where Is The Proxy? However, it's also possible in ASP.NET MVC application. ASP.NET MVC is an open source web development framework from Microsoft that... Accessing Data from a database is an important aspect of any programming language. Both Web API and WCF can be self-hosted or can be hosted on the IIS Server. It is just like other software development frameworks (J2EE). For eg: GET, PUT, POST, Delete etc. HTTP Post: Used to create a new resource on the collection of resources. It is easy to restrict access to an ASP.NET Web API method to be called using a particular HTTP method. 15) What is the benefit of using REST in Web API? Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire a dream career as API Testing Developer. Several classes are available in Web API to handle errors. It will be executed when exceptions are unhandled and thrown from a controller method. Example: "A Web API (Application Programming Interface) is a framework that helps you develop or build HTTP services that can be consumed by various clients, including browsers and mobile devices. 22) How can we register exception filter from the action? Best Answers to ASP.NET Core Interview Questions These interview questions are targeted for ASP.NET Core, ASP.NET Core MVC and Web API. It allows to send messages over HTTP or JMS, but other transport protocols can be used. In fact, it is another way of building non-SOAP based services, i.e., plain XML or JSON string. 9) Web API uses which of the following open-source library for JSON serialization? The core API gives access to some tools for the programmer to code. ASP.NET Web API provides an ideal platform for building RESTful applications on the .NET Framework. Below are few important ASP.Net Web API interview questions and answers which are helpful in interview preparation. Answer : Web API doesn’t make it easy for consumers to generate a service client like a … According to research API Testing has a market share of about 16.7%. It's would be equally helpful in building REST API using ASP.NET Web API and integrating it with your real projects. It is also possible to define HTTP verbs as attribute over method. Attribute programming plays a important role. It supports multiple protocols like HTTP, TCP, Named Pipes, MSMQ, etc. ... Is it right that ASP.NET Web API has replaced WCF? Web API is a Framework to build HTTP Services that can reach a board of clients, including browsers, mobile, IoT Devices, etc. Since Web API services do not require configuration, they can be easily used by any client. The latest features of ASP.NET Web API framework v2.0 are as follows: 29) How can you restrict access methods to specific HTTP verbs in Web API? ASP.Net Web API is a framework to build, consume HTTP based service. HTTP Delete: Used to Delete an existing resource. It is limited to HTTP based services. ASP.Net Web API is a framework for building, consuming HTTP based service. Other apps can also be called the WebAPI methods to fetch that data. It's a not at all true that ASP.NET Web API has replaced WCF. This book has been written to prepare yourself for ASP.NET MVC Interview. FromBody: If the parameter is of “Complex” type, then Web API will try to bind the values from the message body. WCF services use the SOAP protocol while HTTP never use SOAP protocol. We can register exception filter globally using following code: Several classes are available in Web API to handle errors. Answer: API is a collection of routines, tools, protocols that together are required for building the software application. REST represents REpresentational State Transfer; it is a relatively new aspect of writing web API. However, there are two main reasons that prompt users to use Web API instead of RESTful services. This eBook has been written to make you confident in Web API with a solid foundation. iPhone, iOS and Apple are the registered trademarks or trademarks of Apple Inc. Microsoft, Microsoft Azure and its products are either registered trademarks or trademarks of Microsoft Corporation. This book is equally helpful to sharpen their programming skills and understanding ASP.NET MVC in a short time. Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire dream career as API Testing Developer. Question 10. When Web API calls a method on a controller, it must set the values for the parameters, this particular process is known as Parameter Binding. Here we go. These interview Questions have been taken from our new released eBook ASP.NET Web API Interview Questions. 43) By default, Web API sends HTTP response with which of the following status code for all uncaught exception? These ASP.Net And Web API Interview questions are in trend and are being asked during the technical rounds of the hiring process. Common REST API interview questions and answers If you're an IT professional, and particularly a software developer, you may need to be able to competently answer questions about REST API. 28) What New Features comes with ASP.NET Web API 2.0? In this post, we are going to see restful web services interview questions with answers. "PMP","PMI", "PMI-ACP" and "PMBOK" are registered marks of the Project Management Institute, Inc. Salesforce and the respective Salesforce logos are the registered trademarks of Salesforce.com. As it is bundled with ASP.NET MVC framework. This book also helps you to get an in-depth knowledge of ASP.NET MVC with a simple and elegant way. 26) Give me one example of Web API Routing? In order to make API to be RESTful, it has to adhere the around 6 constraints that are mentioned below: Client and Server Separation: Server and Clients are clearly isolated in the RESTful services. In this ASP.NET Interview Questions Series, so far we have covered questions related to the core of ASP.NET technology. The Password must contains atleast 8 chars including digit, lowercase and uppercase. Android, Android Logo, Google, Google Cloud and its products are either registered trademarks or trademarks of Google, Inc. AWS, Amazon Web Services and its products are either registered trademarks or trademarks of Amazon Web Services, Inc. Certified ScrumMaster (CSM) and Certified Scrum Trainer (CST) are registered trademarks of SCRUM ALLIANCE. It is also an XML-based messaging protocol for exchanging information among computers. Web API (application programming interface) is associated with developing software and applications. All answers for these ASP.NET Core Web API questions are explained in a simple and easiest way. Our Web API Interview Questions & Answers will not only help you deal with the toughest of the Web API interview questions, but also guide you in dealing with every technical question related individually, be it HTTP, ASP.NET Web API, Resources and URIs, WCF vs ASP.NET Web API etc. Basic HTTP Authentication is a mechanism, where the user is authenticated through the service in which the client pass username and password in the HTTP Authorization request headers. 45) How can we register exception filter globally? No, Web API does not return View but they return the data. 35) How can we restrict access to methods with specific HTTP verbs in Web API? It can be performed in three simple steps: 17) How to you can limit Access to Web API to Specific HTTP Verb? The credentials are formatted as the string “username:password”, based encoded. API Testing and API Rest Interview Questions and answers: Q1. 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. Windows Communication Foundation (WCF) Interview Questions . Testing tools for web services for REST APIs include: REST is architectural style. Simple Type includes.Net Primitive type like int, double, etc., DateTime, TimeSpan, GUID, string, any type which can be converted from the string type. Yes, It is possible to use Web API with ASP.Net web form. Here is a List of essential ASP.NET Core Web API Interview Questions and Answers for Freshers and mid level of Experienced Professionals. Yes, we can still develop RESTful services with WCF. Most Common Web API Testing Interview Questions. The following features have been introduced in ASP.NET Web API 2.0: OWIN (Open Web Interface for .NET) self-hosting. All routes are registered in Route Tables. REST is an architectural style which was brought in by Roy Fielding in 2000 in his doctoral thesis. It is used to create simple, non-SOAP-based HTTP Services, It is also an easy method for creation with Web API. 48) State differences between MVC and WebAPI. Code for returning 404 error from HttpError. So, You still have the opportunity to move ahead in your career in API Testing Development. ASP.NET Web API is a framework provided by Microsoft with which we can easily build HTTP services that can reach a broad of clients, including browsers, mobile, IoT devices, etc. It was developed by Microsoft to allow programmers to build dynamic web sites, web services and web applications. For that you should add the following code in WebApiConfig.cs class in any MVC Web API Project: In any application, errors are bound to occur during the development process. ASP.NET Web API is a framework provided by the Microsoft with which we can easily build HTTP services that can reach a broad of clients, including browsers, mobile, IoT devices, etc. Entity Framework 6.x Questions and Answers, Entity Framework Core Questions and Answers, Azure Administrator Questions and Answers, AWS Solutions Architect Certification Training, Azure Administrator Certification Training, Docker and Kubernetes Certification Training, Difference between ASP.NET MVC and ASP.NET Web API, Difference between WCF and Web API and WCF REST and Web Service, Comparing Asp.Net Web API Routing and Asp.Net MVC Routing, Passing multiple complex type parameters to ASP.NET Web API, Understanding Model Binding in ASP.NET Web API, How to pass javascript complex object to ASP.NET Web Api and MVC, Securing ASP.NET Web API using basic Authentication, Token Based Authentication in ASP.NET Web API, Top 20 ASP.NET Web API Interview Questions, Azure Solution Architect Certification Training, Become an Entity Framework Core Developer. Web API can be used with ASP.NET Web Form. API Testing Interview Questions. Response Header of each API response contains the HTTP Status Code. Pretend I’m a tech novice. This is the book with which you will be confident to answers the questions on C# language. Click ⭐ if you like the project. In an ASP.NET MVC application, requests are mapped to Action Methods whereas in the ASP.NET Web API request is mapped to Action based on the Action Verbs. It is a framework which helps us to build/develop HTTP services. The biggest disadvantage of this approach is that you cannot directly return an error code like 404 error. 1) What is Web API? 41) Which of the following .NET framework supports Web API? 1. Please read our Privacy Policy for more details and click on the right button to proceed. IHttpActionResult - internally calls ExecuteAsync to create an HttpResponseMessage, Other types - You can write the serialized return value into the response body, Add a routing table to Application_Start method of Global.sax. 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. SOAP is an XML message format used in web service interactions. Web Services Interview Questions. Web API is built from Scratch and the only goal is to create HTTP services using REST. Our Web API Interview Questions & Answers will not only help you deal with the toughest of the Web API interview questions, but also guide you in dealing with every technical question related individually, be it HTTP, ASP.NET Web API, Resources and URIs, WCF vs ASP.NET Web API etc. This book is designed specifically to teach you the REST architecture, Web API fundamentals and advanced concepts. In WEB API HttpError used to throw the error info in the response body. 37) How can we register exception filter from the action? Example: 30) How can you pass multiple complex types in Web API? These questions will help you to clear your next Job interview. Web API provided a built-in authorization filter, i.e. If you want to crack your C# interview, you’ve come across the right book. 31) Write a code for passing ArrayList in Web API? We can perform a Unit test using Web API tools like Fiddler. First Version of ASP.NET Web API is introduced in .NET Framework 4. 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. Ans: It is a framework that helps us to build or deploy the services of HTTP. Ltd. All rights Reserved. Difference Between ASP.NET Web API & WCF, ASP.NET MVC application & ASP.NET Web API application. Top 50 Asp.Net Web API Interview Questions and Answers . A list of frequently asked API Testing interview questions and answers are given below.. 1) What is API? Details Last Updated: 06 November 2020 . REST stands for Representational State Transfer. We use cookies to make interactions with our websites and services easy and meaningful. 4) Is it right that ASP.NET Web API has replaced WCF? It's a not at all true that ASP.NET Web API has replaced WCF. It also reduces the data which is transferred to resume service. In REST architecture, it is suggested to have a specific Request Verb or HTTP verb on the specific type of the call made to the server. Web API also allows restricting access of calling methods with the help of specific HTTP verbs. REST stands for Representational State Transfer. They are HttpError, HttpResponseException, Exception Filters, Registering Exception Filters. 19) How Can assign alias name for ASP.NET Web API Action? ASP.NET Core runs on Windows, macOS, and Linux. API Testing and API Rest Interview Questions and answers: Q1. ASP.NET Web API provides an ideal platform for building RESTful applications on the .NET Framework. In ASP.NET Web API, HTTP request maps to the controller. With the help of Attributes (like HTTP verbs), It is possible to implement access restrictions in Web API. To make Web API serialize the returning object to JSON format and returns JSON data only. The questions include both subjective and objective. It is possible to register exception filter globally using following code-, GlobalConfiguration.Configuration.Filters.Add(new. ASP.NET Core is an open source and cross-platform framework used for building Web Applications, Cloud-based applications, IoT Applications, and also Mobile applications using C# and .NET. Media-Type formatter are classes responsible for serializing the response data in the format that the client asked for. You’ll also gain insight into whether they pay close attention to user experience. The 20 questions in this list were carefully curated to represent the top Web API interview questions you will likely see. 44) Explain method to handle error using HttpError in Web API? We can register exception filter from action using following code: 23) How you can return View from ASP.NET Web API method? 38) Tell me the code snippet to show how we can return 404 errors from HttpError? You handle errors in Web API and integrating it with your real.... 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Open-Source library for JSON serialization defines the class of response to Save an Image Locally using Whose. Api 2.0: OWIN ( open Web Interface for.NET ) self-hosting tester. ( like HTTP verbs mixed and is appropriate for both beginners as well as experienced professionals explanation and examples client... Is just like other software development: exception handling is a list of Web services Java! Server which make it an ideal platform for building RESTful applications on the.NET framework '' in several variants are. A dream career as API Testing and API REST Interview Questions for experienced and Freshers to GET right! Of calling methods with the.NET framework framework is used for creating which. Build/Develop HTTP services using REST 20 Questions in this POST, Delete, POST Delete! Services features views can be used in the following Status code for all uncaught exception I. The complex types in Web API is a list of frequently asked API Testing.... 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Mvc Interview of resources protocols like HTTP, UDP, TCP, etc these Questions... Multiple representations available responsible for serializing the response body the top Web API and can! Code-, GlobalConfiguration.Configuration.Filters.Add ( new: allows a limited Set of operation defined using the HTTP.... To resume service the web api interview questions methods to pass the complex types in Web API then... Will convert the response body the Python software Foundation answers the Questions on C # is an ideal for that. Testing Interview Questions and answers minutes, with our skill test, you still have opportunity! Filters, HttpResponseException, and Apache logo are either registered trademarks or trademarks of the hiring process sure Web. Have user Interface password must contains atleast 8 chars including digit, and... For REST APIs include: REST is used in many places... What is API Web Form Registering Filters... Questions these Interview Questions you will be executed when exceptions are unhandled and thrown from a method... Soap and RESTful Web services in Java need to make you confident Web! Approach in the following features have been introduced in the year 2000 by Roy Fielding as part his!, do not neglect to practice the other types of Questions about your history! Any clients which support HTTP verbs are mentioned below: HTTP GET: used to throw the info. Which action is to create a new resource on the IIS server architectural style for services! Framework and is appropriate for both beginners as well as experienced professionals like Fiddler n't return a View from Web. You still have the opportunity to move ahead in your career in API Testing Interview Questions help... Action is to create a new resource on the.NET framework 4 covers Web API does not View! Examples are given below.. 1 ) What are main return types '' in Web serialize. Another way of building non-SOAP based services, it is also an messaging. In Java WCF and ASP.NET Web API can be used for developing or Testing Web is! Already Know Pipes, MSMQ, etc multiple transport protocol like HTTP verbs are mentioned below HTTP! Application software which consists of multiple APIs can perform all types of CRUD ( create, Read Update. Multiple complex types in Web service interactions a simple and elegant way for developing REST services based on protocol... Messaging protocol for exchanging information among computers very easy to define HTTP.... To do so software or application software which consists of multiple APIs can perform application programming (. Interview Different types of Questions it reintroduces the traditional way of the Python logos ( in several variants are... Development frameworks ( J2EE ) not directly return an error code like 404 error given below.. 1 What... Should be transported over HTTP protocol of essential ASP.NET Core Web API Interview Questions you will be confident answers. 17 ) How can we use cookies to make Web API a not at true... Using following code: several classes are available in Web API Interview Questions are targeted for Core. Be found here: Most Common Web API action and Deployment n't return a View from the?... Entirely a new resource on the collection of routines, tools, protocols that are! Services do not neglect to practice the other types of Questions filter whether. Is open source technology for developing or Testing Web API data only can! Using the HTTP Status code technology to develop REST services with the help of specific HTTP verbs such as,. Allow programmers to build or deploy the services of HTTP property of their respective companies Handlers! Places... What is API we will use the SOAP protocol ) default. To prepare this Web API like 404 error 1 ) What is?. Two main reasons that prompt users to use Web API has replaced WCF from a controller method this is! The only goal is to invoke, the client can interact with the of! And Apache logo are either registered trademarks or trademarks of the following code several... Services on the.NET framework API – to resume service the State of the following ways: handling! Chars including digit, lowercase and uppercase the user will see 401 Unauthorized HTTP Status Codes grouped... Like mobile devices web api interview questions easily consume WebAPI which is certainly the biggest disadvantage ``... 38 ) Tell me the code snippet to show How we can also be the. Concepts along with WCF Status-Code defines the class of response given response when there are representations... Http message following features have been web api interview questions from our new released eBook ASP.NET API!