Oracle Sneior Software Engineer interview questions

My manager is based in the UK.So, my interview was telephonic.Two members conducted the telephonic interview.It was not very hard and I was able to answer most of them. I was selected after the single telephonic interview - which is rather surprising as ORACLE tends to conduct multiple interview rounds.

I got a call from Oracle regarding opening for a developer position. There were 5 rounds of interview: 1. Telephonic 2. Written round 3&4. Technical face to face one was about programming and other was about domain. 5 Director round. I had cleared all the rounds and HR had asked for supporting documents to process my profile. But after that there is no communication from HR regarding the processing. I have no clue what happened and there is no response from the HR for the mails. They do not value others time and there is no formality of responding.