Check Point Software

It was a test, 4 programming questions, each one on a different topic, the first one had to do with binary trees, there was one with a hash table, another to fix different bugs, and another one that I don't remember. You had to answer all of them to

Technical interview with 2 questions, the first one was to design a stack that supports getMin() in O(1) time and O(1) extra space.

One on one interview with team leader, no personal question, just hello and then Design online chat system, describe your design choices. Classes and method. No need for full code implementation. And simple C Cpp code questions. GCD, swap without