Greetings Debdeep,

CEE Ampai is not very difficult,if you are practicing for JEE or Wbjee then it's nothing for you.You can crack the Exam easily and even scoring good marks you can get top Institutes like Narula Institute of Technology or Guru Nanak Institute of Technology. 

You can find the previous years question in the website only.

Good Luck!!

Regards Ankit!!