im workins since 3 years ago Security System Engineer, and i'd like to be certified CISSP, is it possible to do the examination before i reach 5 Years Exp.?
The simple answer is Yes. And if you successfully pass you would become an Associate of (ISC)2 until you have the experience need.
Hope that helps
Yes, although you might also consider the SSCP, for which you could immediately seek endorsement.
Policy is available online.... https://www.isc2.org/Member-Resources/Logo-Usage
The paragraph relevant to this conversation is:
On top of the other information given to you here, I also wanted to provide you with the following link: https://www.isc2.org/Certifications/Associate. On this page, there is quite a bit of information for you to understand the Associate status and what you can do to become fully certified in the certificate of your choosing (i.e. the CISSP).