Deutsche Bank Internship interview questions

There was a screening test first(consisting of programming), the questions were string based and needed n^2 and n^3 time complexity solution, nearly 1/3 who applied made through, followed by interview 1St round wherein questions on DBMS, OS, OOPs were asked and about the projects as well. It was followed by 2nd interview wherein they ask about your projects and technical knowledge if needed, lastly they have a HR round and then the final selects