hi , im preparing for the surgical foundation (PoS) exam and i would like to get mock/oral , previous exams questions specially 2018 exam if possible..
You're going to have a tough time getting those materials. One of the ways Canada differs from the US is that the majority of the review materials are held privately and passed down within residency programs.
The closest public resource is this book: Amazon product ASIN 0071446877
The first 10 or so chapters (not the specialty-specific material) were similar to the POS exam questions.
Otherwise, maybe a current Canadian Resident will share the materials; but culturally they don't tend to.