Query..........................>?

I am takinng coaching from MK GUPTA TAX ........Sir has told us if u hv time then practice all practical questions from my book at home.....but if you dont have time/or dont want to practice,then dont practice from book....register notes are enough....'

I know practice makes man perfect.....but if i dont touch his book,.,...register notes would be enough to clear xams with flying colours..?

This is the question to only MK Gupta sir students who have cleared their pcc/ipcc xams....plz help me