Where can I download the .NET SDK?
.NET SDK can be obtained here.
(You have to install the Microsoft .NET Framework Version 1.1 Redistributable Package
before installing the .NET SDK.)
Are there any free IDEs for the .NET SDK?
Microsoft provides Visual Studio 2005 Express Edition Beta for free. Of
particular interest to the ASP.NET developers would be the Visual Web Developer
2005 Express Edition Beta 2 available
as a free download.
The ASP.NET Web Matrix Project (supported by Microsoft) is a free IDE for
developing ASP.NET applications and is available
There is also a free open-source UNIX version of the Microsoft .NET development
platform called Mono available for download
Another increasingly popular Open Source Development Environment for .NET is
the #develop (short for SharpDevelop) available for download
When was ASP.NET released?
ASP.NET is a part of the .NET framework which was released as a software
platform in 2002.
Is a new version coming up?
ASP.NET 2.0, Visual Studio 2005 (Whidbey), Visual Web Developer 2005 Express
Edition are the next releases of Microsoft's Web platform and tools. They have
already been released as Beta versions. They are scheduled to be released in
the week of November 7, 2005.
Namespaces are logical groupings of names used within a program. There may be
multiple namespaces in a single application code, grouped based on the
identifiers’ use. The name of any given identifier must appear only once in its
List the types of Authentication supported by ASP.NET.
None (Security disabled)
What is CLR?
Common Language Runtime (CLR) is a run-time environment that manages the
execution of .NET code and provides services like memory management, debugging,
security, etc. The CLR is also known as Virtual Execution System (VES).
What is CLI?
The CLI is a set of specifications for a runtime environment, including a common
type system, base class library, and a machine-independent intermediate code
known as the Common Intermediate Language (CIL). (Source: Wikipedia.)
List the various stages of Page-Load lifecycle.
Explain Assembly and Manifest.
An assembly is a collection of one or more files and one of them (DLL or EXE)
contains a special metadata called Assembly Manifest. The manifest is stored as
binary data and contains details like versioning requirements for the assembly,
the author, security permissions, and list of files forming the assembly. An
assembly is created whenever a DLL is built. The manifest can be viewed
programmatically by making use of classes from the
namespace. The tool Intermediate Language Disassembler (ILDASM) can be used for
this purpose. It can be launched from the command prompt or via Start> Run.
What is Shadow Copy?
In order to replace a COM component on a live dedicated server, it was necessary to
stop the entire website, copy the new files and then restart the website. This
is not feasible for the web servers that need to be always running. .NET
components are different. They can be overwritten at any time using a mechanism
called Shadow Copy. It prevents the Portable Executable (PE) files like DLLs
and EXEs from being locked. Whenever new versions of the PEs are released, they
are automatically detected by the CLR and the changed components will be
automatically loaded. They will be used to process all new requests not
currently executing, while the older version still runs the currently executing
requests. By bleeding out the older version, the update is completed.
What is DLL Hell?
DLL hell is the problem that occurs when an installation of a newer application
might break or hinder other applications as newer DLLs are copied into the
system and the older applications do not support or are not compatible with
them. .NET overcomes this problem by supporting multiple versions of an
assembly at any given time. This is also called side-by-side component
Explain Web Services.
Web services are programmable business logic components that provide access to
functionality through the Internet. Standard protocols like HTTP can be used to
access them. Web services are based on the Simple Object Access Protocol
(SOAP), which is an application of XML. Web services are given the .asmx
Explain Windows Forms.
Windows Forms is employed for developing Windows GUI applications. It is a class
library that gives developers access to Windows Common Controls with rich
functionality. It is a common GUI library for all the languages supported by
the .NET Framework.
What is Postback?
When an action occurs (like button click), the page containing all the controls
<FORM... > tag performs an HTTP POST,
while having itself as the target URL. This is called Postback.
Explain the differences between server-side and client-side code?
Server side scripting means that all the script will be executed by the server
and interpreted as needed. Client side scripting means that the script will be
executed immediately in the browser such as form field validation, clock, email
validation, etc. Client side scripting is usually done in VBScript or
code by viewing the page source. It also poses as a possible security hazard
for the client computer.
Enumerate the types of Directives.
@ Reference directive
What is Code-Behind?
Code-Behind is a concept where the contents of a page are in one file and the
server-side code is in another. This allows different people to work on the
same page at the same time and also allows either part of the page to be easily
redesigned, with no changes required in the other. An
attribute is added to the
@ Page directive to
specify the location of the Code-Behind file to the ASP.NET page.
Describe the difference between inline and code behind.
Inline code is written along side the HTML in a page. There is no separate
distinction between design code and logic code. Code-behind is code written in
a separate file and referenced by the .aspx page.
List the ASP.NET validation controls?
What is Data Binding?
Data binding is a way used to connect values from a collection of data (e.g.
to the controls on a web form. The values from the dataset are automatically
displayed in the controls without having to write separate code to display
Describe Paging in ASP.NET.
DataGrid control in ASP.NET enables easy paging of the data.
AllowPaging property of the
DataGrid can be set
True to perform paging. ASP.NET automatically performs paging
and provides the hyperlinks to the other pages in different styles, based on
the property that has been set for
Should user input data validation occur server-side or client-side? Why?
All user input data validation should occur on the server and minimally on the
client-side, though it is a good way to reduce server load and network traffic
because we can ensure that only data of the appropriate type is submitted from
the form. It is totally insecure. The user can view the code used for
validation and create a workaround for it. Secondly, the URL of the page that
handles the data is freely visible in the original form page. This will allow
unscrupulous users to send data from their own forms to your application.
Client-side validation can sometimes be performed where deemed appropriate and
feasible to provide a richer, more responsive experience for the user.
What is the difference between Server.Transfer and Response.Redirect?
Response.Redirect: This tells the browser that the
requested page can be found at a new location. The browser then initiates
another request to the new page loading its contents in the browser. This
results in two requests by the browser.
Server.Transfer: It transfers execution from the first page
to the second page on the server. As far as the browser client is concerned, it
made one request and the initial page is the one responding with content. The
benefit of this approach is one less round trip to the server from the client
browser. Also, any posted form variables and query string parameters are
available to the second page as well.