Need advice regarding Digital TestAS and study materials

Hi everyone
I’m preparing for the Digital TestAS and I’ve chosen the Mathematics and Computer Science module
I’m a little confused about what kind of questions I should expect in the exam and what would be the best way to prepare for it
I tried looking for preparation books but unfortunately the books I’m looking for aren’t available where I live
If anyone has taken the Digital TestAS especially the Mathematics and Computer Science module before could you please share some advice about the type and difficulty of questions or recommend any useful study materials
If anyone has any practice material or resources that they are allowed to share I would really appreciate it
Thank you so much in advance