What is the difference between ASP.NET 1.1 and ASP.NET 2.0?

You can find differences in details-

http://www.interviewsworld.com/Default.aspx
http://www.codeproject.com/KB/aspnet/ComparisonASP1xASP20.aspx

What is difference between DML and DDL in SQL Server ?

DML : The statement that works with data in database is called Data manipulation language.

Example:

• SELECT - Get rows from tables
  
• UPDATE - Update the rows of tables
  
• DELETE - Remove rows from tables
  
• INSERT - Add new rows to tables

DDL: The Statement that works with object in database is called Data Definition language.

Example:

• Create Table Statement
• Create Database Statement
• Create Index Statement
• Drop Statement
• Alter Statement
• Drop table Statemet
• Drop Database Statement

New feature in Visual Studio 2008

some new features are-.

1-Improved Designer (i.e.WYSIWYG)
2-modern CSS editing options
3-enhanced java script debugging and development support
4-visual studio 2008 can target web applications to the .NET 2.0 , .NET 3.0 and .NET 3.5 environment.

To Know more

http://www.interviewsworld.com/Q_326_new-feature-in-visual-studio-2008.aspx

Thanks