.NET Interview Questions: - Can you explain object pooling in .NET?

This is the most practical oriented .Net Interview Questions which may be asked during the Interview by the Interviewer.

COM+ reduces overhead by not creating object from scratch. So in COM+ when object is activated it’s activated, from pool and when it has deactivated it’s pushed back to the pool. Object pooling is configures by using the “ObjectPoolingAttribute” to the class.

Note:- When a class is marked with object pooling attribute it can not be inherited.

ObjectPooling(MinPoolSize := 2, MaxPoolSize := 5, CreationTimeout :=
20000)> _
Public Class testingclass
Inherits ServicedComponent
Public Sub DoWork()
' Method contents go here.
End Sub
End Class

Above is a sample code, which has the “Object Pooling” attribute defined. Below is a sample code, which uses the class.

Public Class App
Overloads Public Shared Sub Main(args() As String)
Dim xyz As New TestObjectPooling()
xyz.doWork()
ServicedComponent.DisposeObject (xyz)
End Sub
End Class

Above is a sample code, which uses the object pooled object. Note the Dispose Object () This ensures its safe return to the object pool.

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