I'm not sure what's your background.
However, for me, if I had a chance to take CCSP exam again, I will definitely read up and had a complete understanding of what is applicable LAW for EU, USA. For example, if a CSP is HQ in USA but has a data center in Singapore, which country laws will it need to comply?
Otherwise, CSSP practice/exam questions is not useful for me.
Instead of memorizing the answers, the correct way is to understand all the answers why is it right or why is it wrong. Then, apply them during the exam by eliminating the wrong answers.
With CISSP study materials still fresh in my mind, there are about 10 questions which I had no clue and another 10 questions 50-50.
Good luck to your exam.