Bloomberg Software Developer Internship interview questions

One in-person interview where we discussed simple programming concepts (software design patterns) and talked about previous projects. This was then followed by a technical interview in which I was given two design problems given by two engineers. Lastly I had two algorithm questions by two different engineers.

Met at a university career fair. Was invited to an on campus interview the same week. There were 3 in-person interviews total. The first interview involved basic (easy-medium) leetcode type questions. The second asked a design (oop) question and I was also asked about to give a high-level overview of a solution to a harder algorithm question. In the 3rd interview I was asked to implement karatsuba fast multiplication (with the optimization). The first two interviews were manageable. The last interview was hard.