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what is system.data.oledb

Posted By :Ashutosh Jha     Posted Date :January 28, 2014    Points :40   Category :ADO.Net 
It contains the objects that we use to connect to a data source via an OLE-DB provider,such as OleDbConnection, OleDbCommand, etc. These objects inherit from the common base classes, and so have the same properties, methods, and events as the SqlClient equivalents.

You can also find related Interview Question to what is system.data.oledb  below: 

How is the data structure of System R different from the relational structure?

Unlike Relational systems in System R
1.Domains are not supported
2.Enforcement of candidate key uniqueness is optional
3.Enforcement of entity integrity is optional
4.Referential integrity is not enforced (More...)

What is the difference between "using System.Data;" and directly adding the reference from "Add References Dialog Box"?

When you compiles a program using command line, u add the references using /r switch. When you compile a program using Visual Studio, it adds those references to our assembly, which are added using "Add Reference" dialog box. While "using" statement facilitates us to use classes without using their fully qualified names.

For example: if u have added a reference to "System.Data.SqlClient" using "Add Reference" dialog box then u can use SqlConnection class like this:


But if u add a "using System.Data.SqlClient" statement at the start of ur code then u can directly use SqlConnection class.

On the other hand if u add a reference using "using System.Data.SqlClient" statement, but don't add it using "Add Reference" dialog box, Visual Studio will give error message while we compile the program. (More...)

Name the classes that are contained in System.Data NameSpace?

Constraint (More...)

Can you store multiple data types in System.Array?

No, If the System.Array is of Some Particular Data Type.(Primitive Data Type)

yes, If the System.Array is of Object Type.

Ex :

create an array of objects.

int in = 50;
string st = "Fifty";

object [] obj = new object[2];
obj[0] = in;
obj[1] = st; (More...)

What is the use of System.Data.DLinq.dll?

System.Data.DLinq.dll provides functionality to work with LINQ to SQL. (More...)

Difference between OLEDB Provider and SqlClient ?

SQLClient .NET classes are highly optimized for the .net / sqlserver combination and achieve optimal results. The SqlClient data provider is fast. It's faster than the Oracle provider, and faster than accessing database via the OleDb layer. It's faster because it accesses the native library (which automatically gives you better performance), and it was written with lots of help from the SQL Server team. (More...)

What is type system unification?

The goal of type system unification is to bridge the gap between value types and reference types that exists in most languages. For example, a Stack class can provide Push and Pop methods that take and return object values.

public class Stack
public object Pop() {...}
public void Push(object o) {...}
Because C# has a unified type system, the Stack class can be used with elements of any type, including value types like int. (More...)

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