They asked pretty straightforward questions through HackerRank. Either you know it, or you don't.
If you've taken a data structures class, you should understand how it works. Just read the "Programming Interview" book, and you should be set by that point.
Sorting some objects
The following metrics were computed from 13 interview experiences for the Two Sigma Software Engineer (Internship) role in New York, New York.
Two Sigma's interview process for their Software Engineer (Internship) roles in New York, New York is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Two Sigma's Software Engineer (Internship) interview process in New York, New York.