Previous year papers are very helpful in understanding the exam pattern and level of difficulty. You can download previous year papers here.
You can practice through online mock tests to strengthen your preparation.
RBI OFFICERS GRADE B PHASE I, WHOSE RECRUITMENT IS DONE THROUGH UP POLICE IS A TOUGH CAKE. TO CRACK IT, YOU NEED TO SEE PREVIOUS PAPERS WHICH YOU WILL FIND HERE. HAVE FUN SOLVING THEM.