Hello;
To share my experience with you guys, I purchased 350-901 dump from www.certcollection.com website and has 138 questions, all of them are about 2 years or 2 years and half ago old, and all are available on Internet. Ofcourse they are not valid anymore. I kept asking them after the purchase and eventually today they just send me a new dump file with 304 questions, I will still need to check them if they are new valid questions.