hi
What is a function overloading?
same function name with different type of arguments types, no of arguments, return type.

Hi Panayan,

AJAX :-Asynchronous JavaScript and XML.

AJAX is a technique for creating fast and dynamic web pages.

AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.

Refer for more

http://www.w3schools.com/ajax/ajax_intro.asp

For

ASP.NET Application and Page Life Cycle

Refer

http://www.codeproject.com/Articles/73728/ASP-NET-Application-and-Page-Life-Cycle

http://www.tutorialspoint.com/asp.net/asp.net_life_cycle.htm


Abstract class

A class that cannot be instantiated.  An abstract class is a class that must be inherited and have the methods overridden. An abstract class is essentially a blueprint for a class without any implementation.

An abstract class is a special kind of class that cannot be instantiated. It normally contains one or more abstract methods or abstract properties. It provides body to a class.

Interface

An interface has no implementation; it only has the signature or in other words, just the definition of the methods without the body.

It's an abstract class with public abstract methods all of which must be implemented in the inherited classes.

In which Scenario you will go for Interface or Abstract Class?

Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes. Even though class inheritance allows your classes to inherit implementation from a base class, it also forces you to make most of your design decisions when the class is first published.
Abstract classes are useful when creating components because they allow you specify an invariant level of functionality in some methods, but leave the implementation of other methods until a specific implementation of that class is needed. They also version well, because if additional functionality is needed in derived classes, it can be added to the base class without breaking code.

Difference Abstract class vs Interface

In the interface all methods must be abstract, in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes.


Overloading: - It is a process of using several procedures with the same name but having different signatures. The signature changes in number of parameters, type of parameter, and order of parameter.
Program
Public Class Form1
 
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  raj()
  raj(2)
  raj(3, 3)
  raj("ravi", 1)
  raj(100, "rahul")
  End Sub
  Public Overloads Sub raj()
  MsgBox("Hello Raj")
   End Sub
  Public Overloads Sub raj(ByVal x As Integer)
  MsgBox(x * 5)
  End Sub
  Public Overloads Sub raj(ByVal x As Integer, ByVal y As Integer)
  MsgBox(x + y)
  End Sub
  Public Overloads Sub raj(ByVal s As String, ByVal x As Integer)
  MsgBox(s & ":has achieved rank" & x)
  End Sub
  Public Overloads Sub raj(ByVal x As Integer, ByVal s As String)
  MsgBox(s & ":has secured" & x)
  End Sub
End Class



Thanks