Registry Access During Startup

What this C++ static initialization interview question tests

This is a medium-difficulty C++ question that probes your understanding of static object initialization order across translation units—a cornerstone of language knowledge for systems programming roles. It rewards clarity about when global and static objects are constructed, and what state is available at each phase of program startup.

To answer correctly, you must trace the order in which static objects are initialized before main() executes, understand how the linker resolves symbols across compilation units, and reason about which constructors run and in what sequence. The question tests whether you can mentally execute a C++ program without running it—a critical skill when debugging initialization-order issues in production systems.

• Static storage duration and the initialization sequence
• Translation unit coupling and linking
• Constructor side effects during startup
• Potential undefined behavior from initialization-order dependencies