Millennium Intern Software Engineer Interview Experience — C++ Concepts After Earlier Tests

The author reports passing an online assessment and a cognitive test for a Millennium software engineering internship, then being rejected in the first virtual-onsite round. That interview involved little coding. Instead, the interviewer examined the resume closely, asking about projects and their difficult components.

Technical discussion focused heavily on C++ concurrency, including mutexes and atomic operations, alongside compiler optimization and differences between GCC and LLVM. The author found the conceptual questions difficult despite being able to write C++ and recommends preparing detailed explanations of prior work. The report gives no additional onsite rounds or specific employer feedback explaining the rejection.