Do it for you.

What this C++ compiler-generated methods question tests

This is a medium-difficulty question that probes your understanding of C++ language fundamentals, specifically the implicit methods the compiler generates for classes. It's common in technical interviews because it separates candidates who have memorized the standard from those who merely write code that happens to work.

The question rewards precise knowledge of what the C++ compiler does behind the scenes when you define a minimal class. To answer well, you need to recall the exact set of methods that are synthesized by default, understand their signatures, and know the conditions under which each one is generated. This knowledge becomes critical when reasoning about object lifecycle, move semantics, const-correctness, and avoiding subtle bugs in production code.

• The rule of zero, rule of three, and rule of five
• Default constructors and member initialization
• Copy and move semantics
• Deleted vs. defaulted methods
• When the compiler suppresses implicit synthesis