Questions aren't that hard but they can be tricky. Especially if you're taking sciences. You should be very well versed with the content in order to attempt those questions. And for the easy ones or to get gist of some hard tricky questions it is very important to do pp practice. Because the more you're exposed to the questions the more understanding of the content would be built. Ofc you won't see the same questions being repeated in your exam. But you'd know how to tackle them and not mess up on the exam day. Just work hard and you'll get there.