Top Latest CSS & CSS3 Interview Questions and Answers 2013,2014,2015

1.Wht is a CSS File? It is used for what purpose

CSS stands for "Cascading Style Sheets", and are used to control and manage font styles, font sizes, and web site color combinations that are used in a web page. In order to retain continuity of "look and feel" throughout a website, all pages within a website will often refer to a single CSS file. The CSS file is typically contained in a separate file from the website, and the various web pages retrieve the CSS file each time a web page is displayed. CSS files make global appearance changes easy -- a single change in a CSS file will mean that any pages using that CSS file will automatically display the changes 

2.How do I make a picture as a background on my web pages?

Point the body background to the name of your image you wish to use as the background as shown below. This body line should be the first line after your < / head> tag.
<body background="picture.gif" >
You can also have the background image fixed, so it does not move when using the scroll bar in the browser. To do this add the BGPROPERTIES tag as shown below. 
<body background="picture.gif" bgproperties="fixed" >