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 Web Technology Questions

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Q:

List the major benefits of E-commerce.

Answer

The major benefits of Ecommerce are:


- Secure       : More secure than a cheque.


- Fast           : The transactions take not more than a few seconds


- Always on  : The purchases can be made 24/7


- Convenient:  Ease of purchasing


-Reduced cost price : Reduction of Marketing and Advertising Costs

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Q:

What is the use of providing web hosting services?

Answer

- Web hosting services provide internet hosting and its services that provide organization to build the websites. 


- The web hosting services also allow the individuals to access the websites through the World Wide Web. 


- Web hosting provides the space to put their content and allow the clients to provide the Internet connectivity. 


- It provides the data center that allows the use of higher space and connectivity properties for the Internet users. 


- It provides tools to allow the website to run on the servers and easily accessible from the outside world using the browser.

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Q:

What does isNaN function do?

Answer

NaN stands for ‘not-a-number’. The function isNaN determines the argument or the value is a NaN. The function returns true if the argument is not a number, otherwise returns false.

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Q:

What are the different web browser tools available to accelerate the speed of the web page?

Answer

- Web accelerators are used to increase the loading of the web page faster and by providing extra features of caching, etc. 


- There are tools that are provided like internet accelerator of browser accelerator that provides security from the spyware and adware programs. 


- The security from the programs are required as they are harmful for the computer and the tools uses the strategies of pre-caching in which the data is automatically cached and when the website is opened again then the fetching is being done from the place where the content is saved. 


- Registry tweaks are used to improve the performance offering the risk management techniques for downloading the resources.

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Q:

What is the use of Media Types in CSS?

Answer

Media types in CSS define the media like audio and video to be used in your HTML document to represent the properties in a better way. The font property can be used for media types as it can be used for print media or screen media. Document requires a defined media to represent the screen that can be read on the paper. It is used as:@media 


<html>


<head>


<style>


@media screen


{


p.test {font-family:verdana,sans-serif;font-size:14px;}


}


@media print


{


p.test {font-family:times,serif;font-size:10px;}


}


</style>


</head>


<body>


----------Your code here----------


</body>


</html>

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Q:

What are the advantages of the external over inline style methods?

Answer

- External Style Sheets are useful as it keeps the style and content separately and doesn’t allow it to mix with each other. It can control the styles for multiple documents, whereas inline style mixes the content with the style and make the code messier.


- External style sheet allows the creation of various classes in a structured way, whereas inline style sheet can’t create or control class elements.


- External style sheet can use selector and grouping methods to apply styles, whereas inline styles can’t use selector and grouping methods.

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Q:

What are Math Constants and Functions using JavaScript?

Answer

Math object has two constant : Math.PI and Math.E


 


Math object has following functions:


- Math.abs(val1);


It will give absolute value of val1.


- Math.max(val1,val2);


This fuction will return maximum value from val1 and val2.


- Math.random();


This function will return a random number between 0 and 1.


- Math.floor(val1)


This function will returns decimal value of val1

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Q:

What are the rules in CSS ruleset?

Answer

CSS consists of two types of CSS rules, first is for ruleset which identifies the style and the selector. It combines the style and the selector. Ruleset is a combination of CSS rules, for example: h1{text-color: 15pt;}, where this is the CSS rule. Ruleset is selector + declaration for example: h1 + {text-color: 15pt;}

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