during the first interview asked about OOP in C++, memory management in C++, standrards overview (11/14 at the moment). At first interview I've found, explained and fixed a problem in existing code (problem related to OOP and memory management), the seconds one task was about implementation of own smart pointer and right memory allocation/deallocation in different situations. At next interviews I got a set of short algoritmic questions, like a summ of binary trees, deep copy of randomly linked list, etc. duration of tech interviews was ~45min
