Radcom Software Engineer interview questions

4 questions: threading race dondition, file system design, implementation of fragmantation module and a bonus question about creating a new malloc function which returns always an address which is a multification of the number 16. sounds very scary but the questions were not hard at all, nake sure to go through trees hash tables and a lot of system design to pass this interview. i was given all of that in paper, sitting alone (which is weird cause you can just sit with your phone) and a one and a half hour time span for the assignmemts.