Bloomberg Financial Analyst interview questions

I was invited to telephone interview twice for the position in London. On the first turn I was not called at defined date and time and had to e mail them informing that I am still waiting for call and not sure what to do next. I received a response with apology and was assigned another date for the interview. I was called 15 minutes earlier before second conversation and was told that the interview is cancelled and I will receive further instructions later by e mail. I was finally called on the third turn and had an descent interview. After two hours from the interview I received the reject with no particular feed back. I continued to apply for jobs at Bloomberg and received another chance for the telephone interview. At this time the conversation happened from the first turn and was a well conducted interview. At the end of the interview I was asked if I had any further questions. I asked the interviewer for particular feedback if I am not successful because I need to know on which aspect to work for improvement. She has promised me that she will give me a detailed feedback on the interview if I am not successful. I received the reject after one and half week with no explanation. have no desire to work in the company afterwards.