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

ADO.NET Interview Questions

Questions Answers Views Company eMail

what is data access layer?

Honeywell,

2 8571

What is the default view of Data Grid?

TCS,

5 14864

what is Sql Native Client?

Gantec Solutions,

5 18745

How To Update A Column In A DataGrid Using C#.NET? I am getting InvalidCastException as (Specified cast is not valid) while updating 2nd column in a datagrid? Id,firstname,lastname are the three columns of my datagrid respectively. I wanted to edit the second column(lastname) and update it. I did the following code in DataGrid's updatecommand(),but failed to update ! Int varid=(int)DataGrid1.DataKeys[e.Item.ItemIndex]; TextBox lnm=(TextBox)e.Item.Cells[2].Controls[0]; string str=lnm.Text ; SqlCommand cmd=new SqlCommand("update customer set lastname='" + str + "' where id=" + varid + "",con); cmd.ExecuteNonQuery(); DataGrid1.EditItemIndex=- 1; DataGrid1.DataBind();

Mind Tree, TCS,

2 16184

what is the syntax code for oldb to connect oracle?

2 5118

what is execute scalar?

Atharva Infotech, Dohatec New Media, Make eIT, Protech,

11 24640

what is Execute NOn Query?

Infosys, Protech, Sars Systems, SwanSoft Technologies,

29 68659

what is the syntax code for oldb to connect oracle

IBM,

3 6462

what is the syntax code to oledb to connect oracle

IBM,

6 11801

When we are running the Application, if any errors occur in the Stored Procedure then how will the server identify the errors?

HCL,

5 11663

how do u connect ado.net to sql server

Microsystems,

1 5893

how to keep track of index in listbox items.

2 5721

How do we invoke queries from the application

2 4602

Why sql Data Reader object not created

Matrix,

9 22125

what is the criteria of selection in sbi interview?

BCS, State Bank Of India SBI,

1 4862

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Un-Answered Questions { ADO.NET }

What is the use of SqlCommandBuilder?

1208

What are the data providers in ADO.NET framework?

1032

What are datareaders?

984

Define bubbled event?

940

What are the usages of the command object in ado.net?

1024

What is the procedure to call a Stored Procedure of Back End in ADO (ActiveX Data Object) and RDO (Remote Data Objects)?

1061

Which is the feature of ado.net?

1014

What is read only and forward only in ado.net?

945

What is ambient transaction?

949

What is connection in ado.net?

952

What is the use of ADO.NET and XML web services?

1047

Give an example of a .net application which connects to microsoft access database using ado.net classes.

1157

Define connection string?

1076

Can we load multiple tables in a dataset?

1135

Can we connect two dataadapters to same data source using single connection at same time?

989

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