I think it’s impossible in 7 days if u are a fresh student. But may be because it’s totally depend on your knowledge and study related hardwork. If u do study throughout whole year and finally last 30 days u can crack by revision.

Otherwise if your knowledge and concepts are good then do fast revision 3–4 chapters per day and 200 questions solve per day then its almost possible.

I think if u want then u can do it.. believe in yourself.

Best of luck