Interview qns plz its urgent

[Janyasree]

Hi Friends
I'm Janyasree new to .net.
these were the question asked in an interview can any one pls give the answer for these questions...

1.what is the compiler used for .net?
2.what does IIS do?
3.what are virtual distructors?
4.How can you provide security for webservices?
5.What is the difference between asp session and asp.net session?
6.Is webservices written in only c#?
7.What is a diffgram?
8.what is the difference between sqlconnection and oledb connection?
9.What are complexviews?
10.sql command for deleteing dublicate rows from a table?

thank u

[Mibble]

all those answers can be found by using your favorite search engine. sounds like they are for an assignment at school.

[ashlee]

The answer for the third questions is:
A virtual destructor is a destructor that is deployed virtually i.e. when the delete keyword is used with a pointer to a base class, the derived most destructor is called.

[caradoc]

One important point user must remember while using virtual destructor is user can't declare pure virtual destructor. Even if a virtual destructor is declared as pure, it will have to implement an empty body at least for the destructor.

[Rahulbatra]

The main reason for the need of virtual destructors is that the user would like to have virtual destructors just so that the correct destructor is called when an object is deleted. So it is always good and wise to use virtual destructors, even if objects don't need any destruction.

[Adrian]

The answer for the 7th question is:
A DiffGram is an XML format that identifies current and original versions of data elements. The Dataset uses the DiffGram format to load and persists its contents, and to serialize its contents for transport across a network connection. When a Data Set is written as a DiffGram, it populates the DiffGram with all the necessary information to accurately recreate the contents, though not the schema, of the Data Set, including column values from both the Original and Current row versions, row error information, and row order.

[bobby21]

Answer for first question:
In .NET , each language has got its own compiler. For c sharp, CSC is the compiler. For vb.net, vbc is the compiler.....etc.,

[bobby21]

Answer for second question:
IIS is the microsoft server.Stands for internet information services. It consists of virtual directory,which acts as a pointer to its physical directory.While mentioning the http protocol in the website address, we mention IIS server name and virtual directory name for requesting the webpage.........any doubts on this...do not hesitate to ask me......cheers...

[bobby21]

Answer for eighth question:
sqlconnection interacts with the database directly,whereas oledbconnection needs oledb standard interface(com based) for interacting with the database.
sqlconnection can interact only with sql server database,whereas oledbconnection can interact with any database.
sqlconnection doesn't need sql provider for interacting with sql server 7.0 (and above).where as, oledbconnection needs oledb data provider for interacting with database.