Adding const, virtually?

What this C++ const and virtual function question tests

This is an easy C++ language-knowledge question that probes your understanding of how const qualifiers interact with virtual functions and method overriding. It's the kind of question interviewers use to assess whether you understand the precise rules the compiler enforces when combining these two features.

To reason through questions like this, you need to know how const-correctness propagates through a class hierarchy, what constitutes a valid override, and how the compiler resolves method calls when both const and virtual dispatch are in play. The question rewards careful attention to method signatures and the C++ type system rather than guesswork.

• Method signature matching and override rules
• Const-correctness in inheritance
• Virtual dispatch and compile-time vs. runtime resolution