What is concurrency? How will you avoid concurrency when dealing with dataset? (One user deleted one row after that another user through his dataset was trying to update same row. What will happen? How will you avoid the problem?)
How to create dynamic gridview?
what is data access layer?
Which object needs to be closed?
What is the executescalar method?
Which is faster entity framework or ado.net?
What are the different layers of ado.net?
What are the main differences between classic ado and ado.net?
What are the different ado.net namespaces?
What is the default Timeout for SqlCommand.CommandTimeout property?
What is the difference between typed and untyped dataset?
What are dataproviders?
How can we load multiple tables in a dataset?