Interviewer was nice. He asked me questions about my background ("tell me about yourself"), asked me about a project I worked on, and then asked me why I wanted to work at Bloomberg. Then, he asked me the following technical question which was along the lines of: "Given a string, find the deepest string nested inside a '()', '[]' or '{}'."

e.g.
'''
"abc(def)ghi" => ["def"]
"abc(def[ghi]jkl)mno" => ["ghi"]
"abc(def)ghi[jkl]mno" => ["def", "jkl"]
"abc" => []
"" => []
(),[],{}
'''