Intercontinental Exchange interview questions

Second round. public, private, and private keywords. copy elision, how to do code review, C++17/20 features, issues with multi threading(data race, dead lock, recursive mutex,...). The last question was a hacker rank coding questions. Similar to LC 2208.

Onsite. How to prevent iterator invalidation? How to do memory management for std::map. std::sort and how to handle it efficiently using custom function, lambda function,...A medium LC question related to sliding window and max heap. compile time error check. How to work with very big number that go above the range for long long int.