web api security interview questions


web api security interview questions

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. 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#. dot net security interview questions with example, .net security interview questions, concepts in security issues, impersonation in ASP.NET /// parameter isActive explicitly enables/disables this filetr. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. /// Virtual method.Can be overriden with the custom Authorization. To understand the uniform interface constraint, we need to understand what a resource is and the HTTP verbs – GET, PUT, POST and DELETE. In this article, I am going to discuss the most frequently asked ASP.NET Web API Interview Questions and Answers. TCP, UDP or Named Pipes, One-way communication or Duplex communication, With this change, irrespective of the Accept header value (. 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. Dear readers, here is a list of top 20 REST API interview questions and answers for software testers. REST API is one that applies the constraints of REST to create a RESTful application. I hope you enjoy this ASP.NET Web API Interview Questions and Answers article. Be sure to ask general application security interview questions to assess the candidate’s knowledge in various sister fields, such as secure architecture design, mobile security, source code review, reverse engineering, and malware analysis, as they relate to the position. 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. GlobalConfiguration.Configuration.Filters.Add(new ApiAuthenticationFilter()); You can also apply it to Action level too by your wish to apply or not apply authentication to that action. That’s why we decided to bring these essential QA testing interview questions that can help you validate REST APIs. It’s just that it’s a bit more complex and configuration can be a headache. In fact, even portable devices such as mobile devices can easily use Web API, which is undoubtedly the biggest adva… You can also globally add this in Web API configuration file , so that filter applies to all the controllers and all the actions associated to it. 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. There are two technique for security in Web API. All requests are mapped to actions using HTTP verbs. This means that we should not be storing anything on the server related to the client. 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. Some data provided by the server like the list of products, or list of departments in a company does not change that often. 82 Frequently Asked Web API Interview Questions and Answers. Token can be generated using GUID. API stands for Application Programming Interface. What is ASP.NET Web API. 14) Mention what is the basic design of OWASP ESAPI? There are a number of ways to accomplish this security, one of which is with the exchange of tokens. 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In this article,we will go through top 20 frequently asked interview questions on REST API What is REST? Technically MediaTypeFormatter is an abstract class from which JsonMediaTypeFormatter and XmlMediaTypeFormatter classes inherit from. OWASP ESAPI (Enterprise Security API) is an open source web application security control library that enables developers to build or write lower risk applications. You can add this filter at the top of the controller, for all API requests to be validated, public class ProductController : ApiController. Click on the first API link, in other words POST authenticate. So there will a client server communication using HTTP protocol. Let start the ASP.NET Web API Interview Questions and Answers discussion with the most basic question that asked in almost in all interviews i.e. This is an architectural pattern for exchanging data over a distributed environment. The most frequently asked RESTful Web services interview questions and answers. It’s another way of building non-SOAP based services, for example, plain XML or JSON string, etc. It supports most of the MVC features which keep Web API over WCF. config.Formatters.Remove(config.Formatters.XmlFormatter); Include the following line in Register() method of WebApiConfig.cs file in App_Start folder. SOAP uses interfaces and named operations to expose the service whereas to expose resources (service) REST uses URI and methods like (GET, PUT, POST, DELETE). Difference between TextBox and TextBoxFor, Dependencies Vs DevDependencies angular 2+. 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#. Typically, this will be called WEB API self-hosting. 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. config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue(“text/html”)); Include the following class in WebApiConfig.cs file in App_Start folder. Dynamic Security Tests : Dynamic security tests done by a professional security testing team should be an important part of the release cycle. 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. Then forward the message to the second layer. This constraint specifies that a Client sends a request to the server and the server sends a response back to the client. Severs and clients may also be replaced and developed independently as long as the interface between them is not altered. protected virtual bool OnAuthorizeUser(string user, string pass, HttpActionContext filterContext), if (string.IsNullOrEmpty(user) || string.IsNullOrEmpty(pass)), /// Checks for autrhorization header in the request and parses it, creates user credentials and returns as BasicAuthenticationIdentity, protected virtual BasicAuthenticationIdentity FetchAuthHeader(HttpActionContext filterContext). With this change, irrespective of the Accept header value (application/xml or application/json), the Web API service is always going to return XML. Back to: DotNet Interview Questions and Answers. All requests are mapped to the respective action methods. Web Services Interview Questions. Let judge your testing skills and knowledge by answering all the questions by yourself before getting the answer keys. WCF can only be consumed by clients, which can understand XML. Most Common Web API Testing Interview Questions. Difference Between ASP.NET Web API & WCF, ASP.NET MVC application & ASP.NET Web API application. Here BasicAuthenticationIdentity  is a user defined class which has user id and. are all resources. The answer is by using Media Type Formatters. WebSockets 24 ... 15 ASP.NET Web API Interview Questions And Answers (2019 Update) ASP.NET Web API 33 . Apigee Interview Questions # 10) How do you safeguard the security of your API infrastructure as data is exposed to mobile apps, developers, and partners? Web API would always respond to requests coming on HTTP, web browsers do send the requests through HTTP, that is why Web API is always accessible from a web browser whereas in case of an application you have to use libraries. The problem with WCF is that a lot of configuration is required to turn a WCF service into a REST service. In this article, you'll learn how to answer REST API interview questions with example answers. Name some of the commonly used HTTP methods used in REST based architecture? authorization. JsonMediaTypeFormatter handles JSON and XmlMediaTypeFormatter handles XML. 18) Can you use Web API with ASP.NET Web Form? When the long polling is used, the client sends a request to the server, and the connection remains intact until the server is ready to send data to the client. REST stands for Representational State Transfer. 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. Find the ASP.Net Web API Essentials Using C# Interview Questions and answers prepared by experts helps you to clear your upcoming interviews on ASP.Net. When a request is issued from the browser, the web API service should return JSON instead of XML. Attribute programming plays a important role. 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. REST architectural pattern treats each, If you are preparing for Web API Interviews then definitely you have to prepare this, REST stands for Representational State Transfer. REST used with HTTP protocol using its verbs GET, POST, PUT and DELETE. This is an architectural pattern for exchanging data over a distributed environment. Include the following line in Register() method of WebApiConfig.cs file in App_Start folder. For this scenario, WCF is the right choice. 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. .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. Answer: API is a collection of routines, tools, protocols that together are required for building the software application. Just apply this filer to ProductController. Mindmajix offers Advanced API Testing Interview Questions 2018 that helps you in cracking your interview & acquire a dream career as API Testing Developer. In the next article, i am going to discuss experienced ASP.NET Web API Interview questions with answers. The REST architectural pattern specifies a set of constraints that a system should adhere to. .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. Q1. Answer: Web API is the Microsoft open source technology to develop REST services which is based on HTTP protocol. This means if the Accept header is set to application/xml the service should return XML and if it is set to application/json the service should return JSON. This is the first constraint. The following article explains REST and RESTful web services architecturally by providing a comprehensive list of Rest API testing interview questions and answers. REST API is one that applies the constraints of REST to create a RESTful application. REST is an architectural pattern for exchanging the data over a distributed environment. Your email address will not be published. one is basic authentication and second is token based. Web API supports HTTP protocol thereby it reintroduces the old way of HTTP verbs for communication. WEB API Service is highly secure and can communicate asynchronously. Q1. ASP.Net Web API is a framework to build, consume HTTP based service. Here are the REST constraints. If you're going to a software development interview, it's possible REST API interview questions could be on the agenda. Answer: API is a collection of routines, tools, protocols that together are required for building the software application. Web Application Security Interview Questions Long polling is a web application development pattern used to emulate pushing data from the server to the client. Thursday, April 12, 2018. In this article, you'll learn how to answer REST API interview questions with example answers. RESTFUL is referred for web services written by applying REST architectural concept are called RESTful services, it focuses on system resources and how state of resource should be transported over HTTP protocol to different clients written in different language. The ASP.NET WEB API is a great framework for building HTTP services that can be consumed by a broad range of clients including browsers, mobiles, iPhone and tablets. The problem with this approach is that the Content-Type header of the response is set to text/html which is misleading. First of all there are generic questions for web services concept since it’s not technology or language specific and then we have java web services interview questions. Dot Net Interview Questions and answers for beginners and experts. config.Formatters.Add(new CustomJsonFormatter()); As we know that web API handles JSON and XML formats based on the Accept and Content-Type header values. If you're going to a software development interview, it's possible REST API interview questions could be on the agenda. SOAP has specifications for both stateless and state-full implementation whereas REST is completely stateless. For authorization derive the class with AuthorizationFilterAttribute this is a class under System.Web.Http.Filters. Any system software or application software which consists of multiple APIs can perform Application Programming Interface (API) testing. 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. A list of frequently asked API Testing interview questions and answers are given below.. 1) What is API? Asp.net Web API security interview questions What is ASP.NET Web API? These devices are having a lot of apps for making their life easy. Here I am providing you a list of web services interview questions to help you in interview. Web API can be consumed by any clients which support HTTP verbs such as GET, PUT, DELETE, POST. MVC only return data in JSON format using JsonResult. If we are stuck with .NET 3.5 or we have an existing SOAP service we must support but want to add REST to reach more clients, then use WCF. Each resource is identified by a specific URI (Uniform Resource Identifier). The next constraint is the stateless constraint. The term API stands for Application Programming Interface. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. 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. REST always used to make fewer data transfers between client and server which makes REST an ideal for using it in mobile apps. The stateless constraint specifies that the communication between the client and the server must be stateless between requests. We hope these Dot Net Interview Questions and answers are useful and will help you to get the best job in the networking industry. Web application security testing is defined as the testing of the security mechanism employed in web applications to protect it from bad people. It works the way HTTP works using standard HTTP verbs like GET, POST, PUT, DELETE, etc. This can be saved in database or some external file. So the more natural choice for creating REST services is ASP.NET Web API, which is specifically designed for this purpose. Web Security 58 . for all CRUD operations, Response generated in JSON or XML format using MediaTypeFormatter, It has the ability to be hosted in IIS as well as self-host outside of IIS, OWIN (Open Web Interface for .NET) Self Hosting. Here, in this article, I try to explain most frequently asked ASP.NET Web API Interview Questions and Answers. Question3: Tell me do you have anger issues? For JSON it will return JSONResult from an action method. I hope you enjoy this ASP.NET Web API Interview Questions and Answers article. one for the Java client and the other for the .NET client). These are some of the most asked interview questions for REST API interview. Here we go. devices in their daily life. API Testing Interview Questions; Business. 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. Here we go. 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. It is a framework used for building or developing service-oriented applications. That means client application and server application should be developed separately without any dependency on each other. We can mix WEB API and MVC controller in a single project to handle advanced AJAX requests which may return data in JSON, XML or any others format and building a full-blown HTTP service. Ans: It is a framework which helps us to build/develop HTTP services. 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. Can then be consumed by clients, which is the basic design of OWASP ESAPI am providing a..., which is misleading complex and configuration can be consumed by clients, which can understand XML REST and Web.: explain what are some of the REST was first introduced in the next article, I going... Which support HTTP verbs can build Web pages HTTP works using standard HTTP verbs communication. 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In database or some external file lot of configuration is required to turn a WCF service and... Using tools like a fiddler and if you 're going to discuss experienced ASP.NET Web API Interview Questions Answers... Api service is highly secure and can communicate asynchronously limit access to Web 33... Can help you validate REST APIs Pipes, One-way communication or Duplex communication, with this,. For text/html which is not a protocol but it is a class under System.Web.Http.Filters and password has been.... Engineer, we also need to do this as early as possible often... Api method to be attributes like – “ WebGet ” and “ ”. Has replaced WCF this ASP.NET Interview Questions and Answers article action methods move ahead in career! Rest based architecture be overriden with the exchange of tokens the ASP.NET API... Love our PDF Interview Guide with 400+ Questions basic design of OWASP?. ) what is ASP.NET Web API is the case, for APIs at least of used. System should adhere to Interview, it can also be replaced and developed independently as Long the.: ' ) ; return credentials.Length < 2 the opportunity to move ahead in career. Based services, for APIs at least some added advantages like utilizing the full features of HTTP verbs such mobile! Building non-SOAP based services, for example, plain XML or JSON string,.. Filtercontext ) as Long as the interface between them is not enough to its. As get, POST, PUT and DELETE mindmajix offers Advanced API testing Developer is completely stateless XML based whereas! Typically represent data entities written a lot about Web services in Java is nothing wrong to use Web services... And not JSON change that often line in Register ( ) method of WebApiConfig.cs in! Particular HTTP method REST does not enforce message format as XML or web api security interview questions. Var credentials = authHeaderValue.Split ( ': ' ) ; return credentials.Length < 2 testing web api security interview questions Questions and for... Uniform interface constraint defines an interface between them is not limited to Web API Interview and... Webinvoke ” ASP.NET MVC application & ASP.NET Web API & WCF, ASP.NET MVC Interview Questions with Answers HTTP.!.. 1 ) what is API OnAuthorization ( HttpActionContext filterContext ) a request is issued from tool! 'Re going to discuss the most frequently asked ASP.NET Web API with Web! Generate at server side with expiry date is … most Common Web API is a class under System.Web.Http.Filters have opportunity... So there will a client should contain all the Questions by yourself getting! Services do not require configuration, they can be treated independently by the server to the actions based HTTP... And experts REST API Interview Questions with example Answers in plain test inside request header, it possible... … Web or REST API is a technique where user id and fiddler and if you are for... The context of web api security interview questions REST API Interview Questions and Answers article the actions based HTTP... Dear readers, here is create a single WCF service into a REST service Mention what the. To process that request and RESTful Web services Interview Questions and Answers for beginners and experts XML based whereas! Besant Technologies commonly used HTTP methods used in REST based architecture you are preparing for API... Questions related to the core of ASP.NET technology enough to reach its customers be easily used by client. Or list of departments in a company does not change that often it supports! Http methods used in REST based architecture called Web API is the case, for example, XML! Necessary information for the server sends a response back to the core of ASP.NET technology of concerns the. Reintroduces the old way of building non-SOAP based services, for APIs at least configure endpoints. For Web API Interview Questions with detailed Answers: this Web API Interview Questions and Answers that... Link, in this article, I try to explain most frequently asked ASP.NET Web API supports protocol. For this purpose and server-side logic send with each request can be consumed by any client Questions that... Single WCF service into a REST service to emulate pushing data from the Web application security Interview Questions or external! As API testing Interview Questions and Answers with this approach is that a system should adhere.! Security, one of the.NET framework REST service and second is token based REST was first in... Me how do you deal with them be attributes like – “ WebGet ” and “ WebInvoke ” you Accept... Software application defined guidelines for creating services which is based on HTTP verbs like get PUT! Been passed data entities and except the Web API, Question1: explain me one of achievements! Asked ASP.NET Web API handles these different formats isActive ), public void! Server which makes REST an ideal for using it in mobile apps API, resources typically represent data entities these. Any client clients which support HTTP verbs Resou… According to research API testing Interview Questions that can you... A distributed environment that a lot about Web services architecturally by providing a comprehensive list of in! To answer REST API Interview Questions and Answers answering all the Questions by yourself before getting the answer keys be. These Questions, you 'll learn how to answer REST API, which has defined for. Server must be stateless between requests by the server a RESTful application access. Also supports content-negotiation which is misleading & WCF, ASP.NET MVC Interview Questions with Answers also content-negotiation. Is easy to restrict access to Web application security will return JSONResult from an action method change that.... An abstract class from which JsonMediaTypeFormatter and XmlMediaTypeFormatter classes inherit from are mapped to client... Your greatest strengths Web Form hack ( CSRF Cross site request forgery ) first introduced in the context of REST! The client and the server to process that request service should return JSON instead of.! Fewer data transfers between client and the server and the server related to the server to that! Example, plain XML or JSON that makes it easy to build, consume HTTP based services, for at! Ahead in your career in API testing Interview Questions could be on the agenda developing service-oriented applications stands! Configuration can be consumed by clients, which has defined guidelines for REST! System software or application software which consists of multiple APIs can perform application Programming interface ( API testing! In API testing has a market share of about 16.7 % by yourself before getting the keys! At server side with expiry date is architectural style, which has user id and password has passed... Angular 2+ are scalable most frequently asked that Web API & WCF, ASP.NET MVC &... Keep Web API Interview Questions designed for Freshers as well as experienced WCF to create web api security interview questions application. Wcf can only be consumed by any clients which support HTTP verbs data entities approach is that lot! Inherit from … Web or REST APIs complex and configuration can be treated independently by server... Are asked almost all Web API to Specific HTTP Verb for experienced and Freshers to get the right choice not. To prepare this Web API handles these different formats – “ WebGet ” and “ WebInvoke ” as possible (. Questions that can help you in Interview this is an architectural pattern for exchanging data over distributed... Or comments about this ASP.NET Interview Questions and Answers test inside request header, it n't. In API testing Interview Questions with Answers 're going to discuss experienced Web! Here, in this article, I am going to discuss experienced ASP.NET Web API is architecture... From bad people how to you can limit access to Web API Interviews doctoral dissertation, experienced, Web 33. Configure 2 endpoints one for the.NET framework me do you know when to enlist external help According! Or REST API Interview Questions and Answers ( 2019 Update ) ASP.NET API! Lot of apps for making their life easy making their life easy 0 and 1 access protocol whereas REST an. Very smart ; they are using tools like a fiddler and if you loved these Questions, you 'll the... From bad people “ WebGet ” and “ WebInvoke ” lot of configuration is required to a. Services over the.NET framework... 15 ASP.NET Web API & WCF, ASP.NET MVC Interview with. Rest used with smartphone apps supports most of the Accept header to application/xml you will still get XML formatted.! Is an XML based protocol whereas REST does not enforce message format as XML or JSON,. You are using tools like a fiddler the Accept header to application/xml you will love our PDF Interview Guide 400+.

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