Mocks will vary by school, teachers can set the questions if they wanted to and you do different texts anyway if I remember correctly..
The best thing to do is to go over the texts (if this is literature..) or the techniques if it's language and have a go st talking about them and applying them to different questions. That's an awful blanket statement because I can't give advice for lit and Lang in one sentence.. and I'm not sure which one is being talked about
But anyway, revise your notes, think about what other things could come up, read your texts or similar texts to those that would come up in the exam (e.g.) online articles in Lang..