Morgan Stanley Quantitative Analyst interview questions

After a brief telephone interview, I had to schedule a techical interview with an associate analyst. The asked about basic statistical and programming theory, former experiences, interests etc., the next one was with a senior member, who asked more detailed technical questions.

Had 4 rounds of phone interviews scheduled throughout the week, they are about 30 minutes each, the interviewers are strats from different teams such as derivatives and rates option, they asked questions ranging from probably, staststic, finance and Black scholes model.