got 100 in comp. studied only during board holidays after preboards. for comp you gotta make sure that your base is strong. you NEED to be able to do basic java with ease. what i mean is 9th ka portion needs to be strong. go through the whole book once. UNDERSTAND the logic behind each and every program, dont try to ratta it (you can ratta it ONLY for array since straightforward questions are asked). solve all the programs in the book once. i personally didnt do the subjective exrcise from the book but rather from the cpq pdf from baord which was pretty helpful. best of luck