I'm pursuing BCA(THIRD YEAR).I HVE FILLED THE FORM FOR OTA. I WANT TO KNOW HOW CN I PREPARE FOR IT? WHICH ARE THE BEST BOOKS TO PREPARE FOR IT? ON WHICH TOPICS I SHOULD THROW MORE LIGHT? I RLY WANT TO CRACK THIS EXAM.I ALWYS WANTED TO JOIN DEFENCE N ITS MY CHILDHOOD DREAM.PLZ GUIDE ME