What is a Ajax and what purpose?

Question

1.what is a Ajax and what purpose? 2. what is life cycle? What is a function overloading? What is a interface class? and what is a Abstract class?

Santhosh Subramaniam · Answer

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

Satyapriya Nayak · Answer

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