IF YOU WANT TO QUALIFY FOR THE FINALS ITS VERY EASY , JUST GO THROUGH THE PREVIOUS YEARS  QUESTIONS  FROM 2008 TO 2011 AND THIS YEARS QUESTIONS AS WELL INCLUDING THAT OF UAE, GULBARGA REGIONS PRELIMS, TECH BYTES AND THE QUESTIONS OF THOSE REGIONS WHICH HAVE BEEN JUST OVER LIKE THAT OF AHMADABAD , HYDERABAD ETC. 

ALSO GO THROUGH THE VIDEOS OF FINAL ROUNDS OF TCS IT WIZ AVAILABLE IN YOU TUBE.

THE BOOKS LIKE BLITZ THIRD VERSION HAS BECOME OLD AND HARDLY QUESTIONS COME FROM THAT. THE STUDY MATERIALS AVAILABLE IN THE NET LIKE THAT OF TEJAS DESHPANDE AND SRIJIT B. MUKHERJEE ARE VERY USEFUL.