Interview questions in my interview

->What is Dot Net Architecture?
C# -->CSC(csharp compiler)-->IL Code(Data Type,Source Code)-->\
                                                                                                             \---->CTS(d.t)--->///}MSIL Code->
                                                                                                             /---->CSC(s.c)-->//}     Managed ->                              
VB-->VBC(vb compiler)------>IL Code(Data Type,Source Code)-->/


Code   --->JIT Compiler------>O.S  
   so dot net is Platform Independent because of JIT compiler......  



->What is the Use of Dot Net in Real Time?


->Tell Me about Sql Server?

->What is the Usage and Types of Joins?


->What is Object?


->What is the difference between Abstract and Interface?


->What is Stored Procedure?


 ->What is DDL command?