ADO.NET interview questions: - Can you explain connection, command, datareader and dataset in ADO.NET?

• Connection: - This object creates a connection to the database. If you
want to do any operation on the database you have to first create a connection
object.

• Command: - This object helps us to execute SQL queries against
database. Using command object we can execute select, insert, update and delete
SQL command.

• Data reader: - This provides a recordset which can be browsed only in
forward direction. It can only be read but not updated. Data reader is good for
large number of records where you want to just browse quickly and display it.

• Dataset object: - This provides a recordset which can be read back and
in forward direction. The recordset can also be updated. Dataset is like a in
memory database with tables, rows and fields.

• Data Adapter: - This object acts as a bridge between database and
dataset; it helps to load the dataset object.

Know more on calling a stored procedure using LINQ by viewing the following
video: -



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