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CSS Interview Questions

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Netscape 4.x has poor support for CSS. Having said that, the following points should be noted.
Invalid HTML will almost certainly cause Netscape to ignore your CSS suggestions at some point. You will find that valid HTML is your best friend, but for Netscape to work properly you must ensure that all elements in your markup which permit closing tags are explicitly closed.
Check and correct your CSS suggestions for the very same reason, Netscape 4.x is in fact doing "the right thing", as per CSS specs (as opposed to MSIE) when it ignores style rules with errors.
Netscape 4.x has what's called an "inheritance problem" into its TABLE element. It can be argued that NS is all within its right to behave as it does in this case, but since the workaround is quite simple it's easy enough to just use it and be done with it.
Let's say you want your TABLE content to "look the same" as your BODY content? "Redundant" styling comes to your help as in e.g. BODY, TABLE, TH, TD { /* insert your styles here */ }
On a generic level, Netscape 4.x likes to have style rules applied directly to the elements where they are needed. You can never really trust the inheritance principle to work correctly at any level in Netscape 4.x. 

Assuming you have already checked that your style sheet declarations do conform to correct CSS syntax, it could be that you have overlooked the importance of a correct order of style declarations for links.
The CSS2 specification makes this following note on the importance of placing the dynamic pseudo-classes ':hover' and ':active' in correct positions in a list of style declarations.
Note that the 'a:hover' must be placed after the 'a:link' and 'a:visited' rules, since otherwise the cascading rules will hide the 'color' property of the 'a:hover' rule.

Similarly, because 'a:active' is placed after 'a:hover', the active color will apply when the user both activates and hovers over the 'a' element.

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