Microsoft has provided an implementation of AJAX functionality known as ASP.NET AJAX. AJAX stands for Asynchronous JavaScript and XML. This is a cross-platform technology that speeds up response time and reduces traffic between client and server. ASP.NET AJAX is a set of extensions to ASP.NET and comes with reusable AJAX controls. In an ASP.NET interview, if you’re asked about ASP.NET AJAX, here’s a concise and comprehensive answer: ASP.NET AJAX is a framework developed by Microsoft for building dynamic and interactive…

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The Global.asax file, which is derived from the HttpApplication class, maintains a pool of HttpApplication objects, and assigns them to applications as needed. The Global.asax file contains the following events, Application_Init Application_Disposed Application_Error Application_Start Application_End Application_BeginReques In ASP.NET, the global.asax file contains application-level events and handlers that are executed in response to application-level events like application start, end, error handling, session start, etc. Some of the major events in global.asax are: Application_Start: This event is fired when the application is…

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Required field Validator Range Validator Compare Validator Custom Validator Regular expression Validator Summary Validator In ASP.NET, validators are used to perform validation checks on user input in web forms to ensure that the data entered by the user is valid before it is processed. There are several types of validators available in ASP.NET: RequiredFieldValidator: Ensures that the user enters a value in a specified input control. RegularExpressionValidator: Validates the input against a specified pattern defined by a regular expression. RangeValidator:…

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Application Events: Application_Start , Application_End, Application_AcquireRequestState, Application_AuthenticateRequest, Application_AuthorizeRequest, Application_BeginRequest, Application_Disposed, Application_EndRequest, Application_Error, Application_PostRequestHandlerExecute, Application_PreRequestHandlerExecute,Application_PreSendRequestContent, Application_PreSendRequestHeaders, Application_ReleaseRequestState, Application_ResolveRequestCache, Application_UpdateRequestCache Session Events: Session_Start,Session_End In ASP.NET, the Global.asax file is used to handle application-level events and is often referred to as the “Global Application Class.” It allows you to respond to application-level events such as application start, end, session start, end, error handling, etc. Here are some commonly used event handlers in the Global.asax file: Application_Start: This event is triggered when the application…

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Application Request Response Server Session Context Trace In ASP.NET, there are several major built-in objects that are fundamental to the framework’s functionality. Here’s a list of some of the key ones: HttpContext: Represents the current HTTP request and response, providing access to request-specific information such as headers, cookies, and form data. HttpRequest: Represents the client’s HTTP request and provides properties and methods to access request data like headers, query string parameters, and form data. HttpResponse: Represents the HTTP response that…

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A PostBack happens when a user takes some action (like submitting a form) that sends information from the page to the server for processing via POST method. In ASP.NET, “PostBack” refers to the process by which a form is submitted to the server for processing. When a user interacts with a web page, such as clicking a button or selecting an option in a dropdown list, a PostBack occurs. This triggers an HTTP POST request to the server, which processes…

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REST (Representational State Transfer) is an architectural style for designing applications and it dictates to use HTTP for making calls for communications instead of complex mechanism like CORBA, RPC or SOAP. There are few principles associated with REST architectural style: Everything is a resource i.e. File, Images, Video, WebPage etc. Every Resource is identified by a Unique Identifier. Use simple and Uniform Interfaces. Everything is done via representation (sending requests from a client to server and receiving responses from server…

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It is a framework provided by Microsoft for writing HTTP services. There are many frameworks available to build HTTP based services. They follow a common guideline of international standardization but with different flavors. For example, all framework must adhere to these status codes- 1xx – Informational Message 2xx – Successful 3xx – Redirection 4xx – Client Error 5xx – Server Error Features It is light weight and thus good for small devices also like tablets, smart phones. No tedious &…

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Compare Validator control. In ASP.NET, if you need to ensure that the values in two different controls match, you can use the CompareValidator control. The CompareValidator control compares the value entered into an input control with the value entered into another control or a constant value. You can specify the type of comparison operation (such as equality, less than, greater than, etc.) and the control to compare against using the ControlToCompare property. Here’s a basic example of how you might…

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HTTP Protocol. The correct answer is: The protocol used to call a Web service is SOAP (Simple Object Access Protocol). SOAP is a protocol for exchanging structured information in the implementation of web services. It relies on XML as its message format and typically operates over HTTP, although other transport protocols such as SMTP can also be used.