If you do a Google search for CISSP questions, your going to get a ton of hits. A lot of these sites start going towards the more "unethical" means of the CISSP as you get into actual test dumps and what not. Then a lot of the other ones are honestly not going to help you a whole lot in preparation for the test IMO. From personal experience (taking the test 7 months ago), I would read Shon Harris's book from front to cover and then get another book that is more of a overview or highlight of everything. Basic IT/IS knowledge will normally narrow down your possible answers by 50%. From there, you need more detailed knowledge of what is going on to figure out what answer is the best. Shon Harris's book goes into those details, which is why I recommend reading it. Then before taking the test, you can get a general review book that may highlight a few things you didn't get from Shon Harris and also give you some good practice questions to test your knowledge.