Logging allocation and construction

Understanding C++ object construction and logging in allocation

This is a medium-difficulty C++ language-knowledge question that tests your ability to trace the order and frequency of constructor and destructor calls in a real program. It rewards careful attention to object lifetimes and initialization semantics rather than guesswork.

To solve it, you need to understand when objects are constructed (and in what order), when temporary objects are created and destroyed, and how different allocation patterns—stack allocation, dynamic allocation, and return-value optimization—interact with logging or side effects. The question probes whether you can mentally execute code and predict observable behavior, a skill that matters for debugging and reasoning about performance in production systems.

• Constructor and destructor invocation order
• Temporary object lifetimes
• Return-value optimization (RVO) and copy elision
• Stack vs. heap allocation semantics