Bloomberg Software Engineer Internship interview questions

I applied online and the next day I got an email to schedule my phone interview. The phone interview lasted about 45 minutes and consisted of 2 problems one of which was a simple problem with a string and the second was to check if a binary tree is a BST. After that they scheduled for me an on-site interview. The interview consisted of 2 parts. On the first day we had a 1.5 hour long technical interview after getting a tour of the office. Those who qualified came on the next day for a behavioral interview which was easy and surprisingly pleasant. After that I got a systems' design interview( not actual coding just designing a system ) with a senior engineer which was a bit unusual for an internship position.