ADO.NET Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

ADO.NET Interview Questions

Questions Answers Views Company eMail

OleDbDataAdapter ole=new OleDbDataAdapter(new OleDbCommand ("select * from login",oleDbConnection1)); OleDbCommandBuilder cmd=new OleDbCommandBuilder(ole); ole.Fill(dataSet11,"login"); DataRow drow=dataSet11.Tables ["login"].NewRow(); drow[0]=textBox1.Text; drow[1]=textBox2.Text; drow[2]=textBox3.Text; dataSet11.Tables["login"].Rows.Add (drow); ole.UpdateCommand=cmd.GetUpdateCommand(); ole.Update(dataSet11,"login"); MessageBox.Show("one row added"); this gives exception.how to solve it

Nimaya,

1 5456

oledbdataadpter with ms access in c#.net giving exception System.Data.OleDb.OleDbException while writing adapter.update(dataset,"tabname"); how to update the database from dataset?

Infosys, Wipro,

2381

make a login control??

1 4071

how to add a selected row of a gridview to another gridview without reloading the page??

2 5955

what is connection pooling ?

Vertex,

3 7745

What is the Magic Tables in Sqlserver2000?

IBM, SQL Star,

7 11364

What is reference by value how does it works in .net?

SQL Star,

2 5535

How to Handle the exceptions in Sqlsrver2000

SQL Star,

3 7275

The answers which posted above is not satisfied my requirement? Can some one post teh exact answer? Thanx

2029

What are the attirbutes of DataSet?

IBM,

5 11284

What are the Different layers in ADO.Net?

eXensys,

10 19085

i have two textboxes one for user name and another for password . i have a table name compare(which contains name,passwod etc.,)my doubt is how compare username textbox with name column and how compare password textbox with passwod column. i want the code

Wipro,

9 17951

types of Store procedure in Sqlserver2000?

4 10781

what purpose of Indexing creating? directly we can search the reqired row with the help of query?what is the use of indexing?

3 13763

explain connection less and with connection?diference between data reader,data set,data adapter? can we use data reader,data set in a single application? if yes explain with simple code,if no explain?

Techno Labs,

3 17051

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Un-Answered Questions { ADO.NET }

Can we load multiple tables in a dataset?

1134

What is ado.net object model?

988

What are the key events of sqlconnection class?

1193

What are all features of ADO.Net?

984

Explain the difference between data reader and data set?

927

Explain how to bind the controls(best practice) comboboxes to the data in the dataset?

1027

Command objects uses, purposes and their methods.

985

What is ole db query?

989

What is untyped dataset?

1094

What are the advantages of oledb compared with other classes?

2794

What are the pre-requisites for connection pooling?

1005

What is ado.net objects?

965

What is the difference between the clone() and copy() methods of the dataset class?

1088

What is aggregating data ?

960

What are the essential features of ado.net?

955

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