The interview process for Bloomberg is a long and detailed one. For me, there was an online aptitude test - the top 5% or so would then proceed to the phone interview stage. There where three phone interviews, each becoming increasingly more complex. The typical C++ questions relating to polymorphism, inheritance, access types, etc. If you make it through these, then you will be invited to New York. Here is where my impression of the process was soured. I'm a senior software engineer that was being interviewed with a view to working on some of the parallel processing development - something that I have a lot of experience with. I was however interviewed by two junior engineers that were asking college type questions way, way lower in complexity than anything in the phone interviews or aptitude test.