I contacted Jane Street through a company forum at my school and applied for an internship. The process was going to be one phone screen and three onsite interviews in London, but I did not go through the phone screen. The phone screen really used phones, not Skype or anything, and the bad quality was a bit troublesome. Nevertheless, the interviewer was really nice and gave me advice for future interviews.

Explain in detail how a list structure is made in Caml, what are the stack and heap complexities of their basic operations.