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Saturday, 6 April 2013

seven important facts about asp net

seven important facts about asp net
Categories-: Interview Questions And Answers
C#.Net Interview Questions And Answers

Fact 1: ASP.NET Is Integrated with the .NET Framework

The .NET Framework is divided into an almost painstaking collection of functional parts, with a staggering total of more than 7,000 types (the .NET term for classes, structures, interfaces, and other core programming ingredients). Before you can program any type of .NET application, you need a basic understanding of those parts—and an understanding of why things are organized the way they are.
The massive collection of functionality that the .NET Framework provides is organized in a way that traditional Windows programmers will see as a happy improvement. Each one of the thousands of classes in the .NET Framework is grouped into a logical, hierarchical container called a namespace. Different namespaces provide different features. Taken together, the .NET namespaces offer functionality for nearly every aspect of distributed development from message queuing to security. This massive toolkit is called the class library.
Fact 2:ASP.NET Is Compiled, Not Interpreted

One of the major reasons for performance degradation in classic ASP pages is its use of interpreted script code. Every time an ASP page is executed, a scripting host on the web server needs to interpret the script code and translate it to lower-level machine code, line by line. This process is visibly slow.

ASP.NET applications are always compiled - in fact, it’s impossible to execute C# or Visual Basic code without it being compiled first.

Fact 3: ASP.NET Is Multilanguage

With ASP.NET there is no matter what language you use to develop your application, as the code is compiled in IL (Intermediate Languge). IL is a stepping stone for every managed application. (A managed application is any application that’s written for .NET and executes inside the managed environment of the CLR.) In a sense, <u>IL is the language of .NET, and it’s the only language that the CLR recognizes

 Fact 4: ASP.NET Is Hosted by the Common Language Runtime

Automatic memory management and garbage collection
Every time your application instantiates an object, the CLR allocates space on the managed heap for that object. However, you never need to clear this memory manually. As soon as your reference to an object goes out of scope (or your application ends), the object becomes available for garbage collection. The garbage collector runs periodically inside the CLR, automatically reclaiming unused memory for inaccessible objects. This model saves you from the low-level complexities of C++ memory handling and from the quirkiness of COM reference counting.
Type safety:
When you compile an application, .NET adds information to your assembly that indicates details such as the available classes, their members, their data types, and so on. As a result, your compiled code assemblies are completely self-sufficient. Other people can use them without requiring any other support files, and the compiler can verify that every call is valid at runtime. This extra layer of safety completely obliterates low-level errors such as the infamous buffer overflow.

Extensible metadata:
The information about classes and members is only one of the types of metadata that .NET stores in a compiled assembly. Metadata describes your code and allows you to provide additional information to the runtime or other services. For example, this metadata might tell a debugger how to trace your code, or it might tell Visual Studio how to display a custom control at design time. You could also use metadata to enable other runtime services (such as web methods or COM+ services).

Structured error handling:
If you’ve ever written any moderately useful Visual Basic or VBScript code, you’ll most likely be familiar with the limited resources these languages offer for error handling. With structured exception handling, you can organize your error-handling code logically and concisely. You can create separate blocks to deal with different types of errors. You can also nest exception handlers multiple layers deep.

The CLR provides a pool of threads that various classes can use. For example, you can call methods, read files, or communicate with web services asynchronously, without

Fact 5: ASP.NET Is Object-Oriented

Asp provides a relatively feeble object model, On the other hand is truly object oriented.

Not only does your code have full access to all objects in the .NET Framework, but you can also exploit all the conventions of an OOP (object-oriented programming) environment. For example, you can create reusable classes, standardize code with interfaces, extend existing classes with inheritance, and bundle useful functionality in a distributable, compiled component.

Fact 6: ASP.NET Is Multi-device and Multi-browser

One of the greatest challenges web developers face is the wide variety of browsers they need to support. Different browsers, versions, and configurations differ in their support of HTML. Web developers need to choose whether they should render their content according to HTML 3.2, HTML 4.0, or something else entirely.

ASP.NET addresses this problem in a remarkably intelligent way.
Although you can retrieve information about the client browser and its capabilities in an .
Asp.Net page.
For example:
ASP.NET’s validation controls, which use JavaScript and DHTML (Dynamic HTML) to enhance their behavior if the client supports it. This allows the validation controls to show dynamic error messages without the user needing to send the page back to the server for more processing.

Fact 7: ASP.NET Is Easy to Deploy and Configure

ASP.NET simplifies deployment process as :- Every installation of the .NET Framework provides the same core classes. As a result, deploying an ASP.NET application is relatively simple. For no-frills deployment, you simply need to copy all the files to a virtual directory on a production server (using an FTP program or even a command-line command like XCOPY). As long as the host machine has the .NET Framework, there are no time consuming registration steps.

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