Credit Card Validation Code...?

I was wondering if it is okay to give out your credit card validation code on the internet. Like if a company asks for that code does it mean it is a scam? I was just curious because I am looking at "at home jobs" and every one I look at you need to enter your credit card information and the V-code. Don't tell me it's dangerous for my credit card stuff on the internet because I already know that but any other help would be great. Thanks