Type Roulette

What this C++ type-system interview question tests

This is a medium-difficulty question that probes your working knowledge of C++ type rules, implicit conversions, and operator overloading. It rewards careful reading of code and a solid mental model of how the compiler resolves types and function calls — rather than guessing or running code in your head.

To solve problems like this, you need to trace through type deduction, understand which overloads are available, and predict how the compiler ranks candidate conversions. The question tests whether you can reason precisely about language semantics, a skill that matters when debugging subtle type-related bugs or optimizing template-heavy codebases in a quant or systems environment.

• Implicit type conversions and user-defined conversions
• Operator overload resolution
• Template argument deduction and specialization
• const and reference qualifiers in function signatures