Transferring ownership.

What this C++ thread-ownership interview question tests

This is an easy conceptual question on C++ concurrency that probes whether you understand the memory and lifetime semantics of std::thread objects. Interviewers ask it to verify you know how ownership rules work in the standard library and can reason about which operations are legal on a thread object.

The question targets your grasp of move semantics and RAII principles as they apply to threads. In particular, it examines whether you can distinguish between operations that transfer ownership (and leave the original object in a safe state) and those that do not, and what the implications are for thread lifecycle management.

• Move semantics and std::move for thread objects
• The relationship between std::thread ownership and std::detach / std::join
• What it means for a thread object to be joinable
• Why copying a thread object is disallowed