Oracle Senior Software Engineer interview questions

I applied through recruiter. and attended interview in Prestige Tehnology Park IN Marathahalli vartur hobli, and took one day for full 5 round interview .. actualy first round is written test core java concepts,mainly on multithreading,collection,hibernate session and second round 2 peoples took asked explanation about programs which i written in written test . some technical questions and after that continued to 3rd,4th,5th round was telephonic in thier office only.. after that manager told me to wait for some time he will call back soon and i waited and after some time got call and he asked me about my CTC and Expected salary(he dint ask is dis negotiable ?) and told Our HR will call u in next week but d thing s i dint get any call after that from oracle.. so i felt realy bad why he told me wait for HR call ? and after clearing that hectic interviews of 5 rounds also no use... just guys even if u clear all rounds also its just luck in oracle... dont hope for ORACLE untill u get Offer Letter .