Interactive Brokers Software Engg. interview questions

First-round (Aptitude): It includes Java questions like collections, OOPS concepts and aptitude questions. Only 20 students were selected from 150-200 students. Second-Round(Psychometric Test): There are two questions in this round and there are about 40+ options. We have to select multiple answers. AI tool is used here to detect our personality. 2 students are rejected from this round. Round-Three(Pen Paper Test): The questions are based on link lists, data structures, sorting algorithms, output prediction, collections, java and aptitude questions. 6-7 students are selected from 16 students. After a week, selected students were asked to go to their location. Round-Four(F2F interview): There are two interviewers. The asked me questions about Java concepts and questions from the pen-paper test. Other ways to solve the problems etc. And mainly problem-solving abilities.