Cs self study

hie every one I posted this so many times but I want correct reply.. I am sneha I am gng to appear cs executive this dec and I am preparing self sirr and I want secure AIR in this exam sirr . I am preparing institute materials and sucheetha scanners sir . is it sufficient or I havr to do anything more .. to secure rank plzz replyyy...... so that I will work muchhh....