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ADO.NET Interview Questions


ADO.NET Interview Questions

Questions: 30
Comments: 191
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 ADO.NET Interview Questions
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Can we do database operations without using any of the ADO.net objects?This was an interview question 
Latest Answer: no it is impossible ...

One interview I faced a Q:how can i retrieve two tables of data at a time by using data reader?Data reader read and forward only, how is it possible to get 2 tables of data at a time 
Latest Answer: This is absolutely true that theoretically you can't access two resultset concurrently using Datareader due to its nature of having the connection state with database and forward only traversing. However, if it is possible to have the data from two ...
Read Answers (9) | Asked by : sudhakar

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 
Latest Answer: After seeing ur code i understood that u haven't call the bind method.gridview1.EditItemIndex = -1;after this u call the bind method .gridview1.databind();//in this place u call the grid bind method n try it once. ...

Latest Answer: The DataGrid default view is tabular form and optionally supports selecting, sorting, paging, and editing the data ...
Read Answers (4) | Asked by : Srikanta Nandi

What is Pull Model and Push Model in ADO.Net? What are the situations when we use one over the other?

Which one of the following objects is a high-level abstraction of the Connection and Command objects in ADO.NET?DataReaderDataSetDataTableDataViewDataAdapter
DataAdapter 
Read Answers (1) | Asked by : Pandian S

Latest Answer: About DataSet 1. ASP.NET DataSet is Designed for connected access. 2. Dataset is a data structure, which represents the complete table data at same time. 3. Dataset is just a data store and manipulation is done through DataAdapters in .NET. 4. ...
Read Answers (11) | Asked by : Dhaval

How many App Domains an ASP.NET Worker Process creates if suppose 10 different users are logged into the web site

What is the difference between .Net framework and .Net Compact Framework?Is there any diffence between these two
Read Answers (2) | Asked by : Gopal krishna

Latest Answer: TO Connect to a DatabaseFirst we need to have a namespace like System.Data.Sqlclientthen connect to database as follows1.Create connection using SqlConnection Sqlconnection con=new sqlconnection("Connectionstring")2.Open connection con.Open()3.Pass ...
Read Answers (10) | Asked by : lakshminarayanan

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