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CSS Interview Questions and Answers



How do I place text over an image?
To place text or image over an image you use the position property. The below exemple is supported by IE 4.0. All you have to do is adapt the units to your need.

<div style="position: relative; width: 200px; height: 100px">
<div style="position: absolute; top: 0; left: 0; width: 200px">
<image>
</div>
<div style="position: absolute; top: 20%; left: 20%; width: 200px">
Text that nicely wraps
</div>
</div>

what CSS is, why not start coding?
CSS is sort of like scripting language made for the web. In contrary with HTML, DHTML, JavaScript, VBScript and many others. CSS is strictly for formatting your web-page and now many new browser support it. (NOTE: Older browser do not support CSS, so please check your browser version and make sure whether it supports it or not. You may have to update your current Browser.)

The way the code goes into your Web-page is through a variety of ways. The way CSS works is that is the code is set between the<head></head> tags. You can put the CSS code after </title> which is what most people do. Now, here are the following ways of making your webpage with CSS enabled features:

1.) Writing your CSS code within your HTML source code. This is how it would look like:

<html><head><title>My First CSS!</title>
<!-- Now begin the CSS coding! -->
<STYLE TYPE = "text/css">
<!--
body {
background-color: #eeeee;
}
p {
text-align: left;
color: black;
font: Verdana;
font-size: 80%;
}
a {
text-decoration: none;
color: black;
font-weight: bold;
}
a:hover {
text-decoration: underline;
color: red;
font-weight: bold;
}
-->
</STYLE>
<!-- End CSS code -->
</head><body></body></html>

2.) Linking to your CSS file. This tells the webpage to find the .css file and use it as the CSS code. Here is the code that would allow you to do:

<html><head><title>CSS</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head><body /></html>

As you can see from the code above, the <link> tag is pretty helpful. What it does is that it links to the style.css file which has all the css code. Just like embedding an image throught he <img> tag.

Now to explain a bit from the first example. CSS code isn't very hard to understand.Take for example the body { ..} part. What it does is that it formats how the <body> tag in HTML would work. That is a very simple way of formatting the body tag with the CSS. To help you understand better, here is a simple syntax for CSS:

selector { property1: value1; property2: value2;}

The "selector" sort of relates to the html tags used for outputting etc...

We all know that <a> is a tag used for links. You will see in the example about a:hover and a itself. <br>What a does it just sets the characteristics of the format. You can set how you want a link to appear using the font size, weight etc..

Then comes the "a:hover". What does is also pretty self explanatory. It acts on when a person moves the mouse cursor over the links.

ADVANCED CSS FEATURES:

CSS can be even used to change the appearance of the scroll bar at your right side. Unfortunately, that only works with IE. You have to be using IE in order for this to work. Here is how to change some appearances of your scroll bar:

The CSS statements for doing this are:
1) scrollbar-3dlight-color
2)scrollbar-arrow-color
3) scrollbar-base-color
4) scrollbar-dark shadow-color
5) scrollbar-face-color
6) scrollbar-highlight-color
7) scrollbar-shadow-color
8) scrollbar-track-color

<style type="text/css">
<!--
BODY {
scrollbar-arrow-color: green;
scrollbar-face-color: #FFFFFF;
scrollbar-track-color: rgb(12,35,244);
}
// -->
</style>

How to customize your textboxes.
Here is the code on how to do it:

<style type="text/css">
<!--
BODY {
scrollbar-arrow-color: green;
scrollbar-face-color: #FFFFFF;
scrollbar-track-color: rgb(12,35,244);
}
TEXTAREA {
scrollbar-arrow-color: green;
scrollbar-face-color: #FFFFFF;
scrollbar-track-color: rgb(12,35,244);
}
// -->
</style>

That above code, has some similarities. The textbox area is treated with the same function statements as for the scrollbar. The scrollbar statements goes in the BODY selector.

Why does my content shift to the left on some pages (in FF)?
That'll be the pages with more content? The ones that have a vertical scrollbar? If you look in IE there's probably a white space on the right where there would be a scrollbar if there were enough content to require one. In Firefox, the scrollbar appears when it's needed and the viewport becomes about 20px smaller, so the content seems to shift to the left when you move from a page with little content to one with lots of content. It's not a bug or something that needs to be fixed, but it does confuse and irritate some developers.

If, for some reason, you'd like Firefox to always have scrollbars - whether they're needed or not - you can do this :

CSS html {
height:100.1%;
}

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Check Html Interview Questions for more Html Interview Questions with answers