Definitions

Stored Procedure:

Stored procedures are precompiled database queries that improve the security, efficiency and usability of database client/server applications. Developers specify a stored procedure in terms of input and output variables. They then compile the code on the database platform and make it available to aplication developers for use in other environments, such as web applications. All of the major database platforms, including Oracle, SQL Server and MySQL support stored procedures. The major benefits of this technology are the substantial performance gains from precompiled execution, the reduction of client/server traffic, development efficiency gains from code reuse and abstraction and the security controls inherent in granting users permissions on specific stored procedures instead of the underlying database tables.

What is Polymorphism?

 Generally, the ability to appear in many forms. In object-oriented programming, polymorphism refers to a programming language's ability to process objects differently depending on their data type or class. More specifically, it is the ability to redefine methods for derived classes. For example, given a base class shape, polymorphism enables the programmer to define different area methods for any number of derived classes, such as circles, rectangles and triangles. No matter what shape an object is, applying the area method to it will return the correct results. Polymorphism is considered to be a requirement of any true object-oriented programming language (OOPL). 

There Are Two Types of Polymorphism

1. Static Polymorphism
   
2. Dynamic Polymorphism

1. Static Polymorphism

In Static Polymorphism ,Which method is to be called is decided at compile-time only. Method Overloading is an example of Static Polymorphism.

Method overloading is a concept where we use the same method name many times in the same class,but different parameters. Depending on the parameters we pass, it is decided at compile-time only, which method is to calles. The same method name with the same parameters is an error and it is a case of duplication of methods which c# does not permits. In Static Polymorphism decision is taken at compile time.

public Class StaticPolyDemo
{
  public void display(int x)
 {
    Console.WriteLine(“Area of a Square:”+x*x);
 }
  public void display(int x, int y)
 {
    Console.WriteLine(“Area of a Square:”+x*y);
 }
 public static void main(String args[])
 {
    StaticPolyDemo spd=new StaticPolyDemo();
    Spd.display(5);
   Spd.display(10,3);
 }
}

2. Dyanamic Polymorphism

In this Mechanism by which a call to an overridden function is resolved at a Run-Time( not at Compile-time). If a BaseClass contains method must be a Virtual method in C# to be overridden..

Class Test
{
  Public virtual void show()
 {  
  Console.WriteLine(“From base class show method”);
    }
}
Public Class DynamicPolyDemo : Test
{
   Public  override void show()
   {
         Console.WriteLine(“From Derived Class show method”);
   }
   Public static void main(String args[])
   {
       DynamicPolyDemo dpd=new DynamicPolyDemo();
      Dpd.show();
       
    }
}

 What is the Difference between AJAX and Javascript?

AJAX is a part of Javascript programming. Javascript is just
a client-side scripting language that is used to control a
web page once a user has downloaded the page. AJAX is a
particular usage of Javascript in which javascript
communicates with the remote script and receives the
response from the server, without having to reload the whole
page.

Javascript is a client-side scripting programming
language... AJAX is a technique incorporating the use of
Javascript, a server-side scripting language, and XML. But
javascript is the main core of ajax-based systems. AJAX
stands for Asynchronous Javascript and XML

 

What is CSS?

CSS was first developed in 1997, as a way for Web developers to define the look and feel of their Web pages. It was intended to allow developers to separate content from design so that HTML could perform more of the function that it was originally based on - the markup of content, without worry about the design and layout.
CSS didn't gain in popularity until around 2000, when Web browsers began using more than the basic font and color aspects of CSS. And now, all modern browsers support all of CSS Level 1, most of CSS Level 2, and some aspects of CSS Level 3.
Web Designers that don't use CSS for their design and development of Web sites are rapidly becoming a thing of the past. And it is arguably as important to understand CSS as it is to know HTML - and some would say it was more important to know CSS.

CSS is an Abbreviation

It stands for Cascading Style Sheet.
Style sheet refers to the document itself. Style sheets have been used for document design for years. They are the technical specifications for a layout, whether print or online. Print designers use style sheets to insure that their designs are printed exactly to specifications. A style sheet for a Web page serves the same purpose, but with the added functionality of also telling the viewing engine (the Web browser) how to render the document being viewed.
Cascade is the special part. A Web style sheet is intended to cascade through a series of style sheets, like a river over a waterfall. The water in the river hits all the rocks in the waterfall, but only the ones at the bottom affect exactly where the water will flow. The same is true of the cascade in Web style sheets.
Every Web page is affected by at least one style sheet, even if the Web designer doesn't apply any styles. This style sheet is the user agent style sheet - the default styles that the Web browser will use to display a page if no other instructions are provided. But if the designer provides other instructions, the browser needs to know which instructions have precedence.
For example, in my Web browser, the default font is "Times New Roman" size 16. But nearly no pages I visit display in that font family and size. This is because the cascade defines the second style sheets set by the designers to redefine the font size and family and override my Web browser's defaults.

Where is CSS Used?

CSS is used to style Web pages. But there is more to it than that. CSS is used to style XHTML and XML markup. This means that anywhere you have XML markup (including XHTML) you can use CSS to define how it will look.
CSS is also used to define how Web pages should look when viewed in other media than a Web browser. For example, you can create a print style sheet that will define how the Web page should print out and another style sheet to display the Web page on a projector for a slide show.

Why is CSS Important?

CSS is one of the most powerful tools a Web designer can learn because with it you can affect the entire mood and tone of a Web site. Well written style sheets can be updated quickly and allow sites to change what is prioritized or valued without any changes to the underlying XHTML.
The challenge of CSS is that there is so much to learn. But it doesn't seem like it. After all, there are only around 60 properties in CSS Level 1 and around 70 in CSS Level 2. Compared with the number of HTML tags and attributes to learn, that can feel like a cake walk.
But because CSS can cascade, and combine and browsers interpret the directives differently, CSS is more difficult than plain HTML. But once you start using it, you'll see that harnessing the power of CSS will give you more options and allow you to do more and more things with your Web sites.
If you want to be a professional Web designer, you need to learn Cascading Style Sheets. But luckily, they are fun to learn.

What is Javascript?

What exactly is Javascript?:

Javascript is a programming language that is used to make web pages interactive. It runs on your visitor's computer and so does not require constant downloads from your web site.

Are Javascript and Java the same?:

No, they are two completely different computer languages. Only their names are similar.

What do I need to run Javascript?:

Javascript support is built right into web browsers. Provided that the visitors to your site are using web browsers that support Javascript (most do) and have Javascript enabled (it is by default) then your Javascript will run.

Do I need to learn Javascript to be able to use it?:

No. There are plenty of Javascripts that have already been written that people have made available for you to plug straight into your web page. All you need to know to be able to use such scripts is how to paste the supplied code into the required places in your web page.

What do I need to write Javascript?:

Javascript is an interpreted language and so no special program is required to be able to create usable code. Any plain text editor such as Notepad is quite satisfactory for being able to write Javascript. That said, an editor which colourizes the code to make it easier to see what is what makes it easier to find your mistakes but then my Javascript Formatter can reformat your script to make errors even easier to spot.

Can I use HTML instead of Javascript?:

No. HTML and Javascript are two completely different things. HTML is a markup language designed for defining static web page content. Javascript is a programming language designed for performing dynamic tasks.

Can I use PHP or some other server side language instead of Javascript?:

Perhaps, it depends on where the code needs to run. If it can run before the page loads you can use a server side language. If it has to run after the page has loaded then you must use Javascript as this is the only scripting language supported by all web browsers that support client side scripting.

Does the Javascript go in the same file as the HTML?:

It can but your scripts will be more easily reused on multiple pages of your site if you place them in separate files (using a .js extension helps identify them as Javascript). You then just link the Javascript to your HTML by inserting a <script> tag. The same Javascript can then be added to several pages just by adding the appropriate tag into each of the pages to set up the link.