String them together.

What this C++ code-tracing question tests

This is a medium-difficulty question that asks you to read and predict the output of a C++ code snippet. It probes your understanding of language semantics—how strings, operators, and standard library functions actually behave—rather than algorithm design or mathematical reasoning.

To answer correctly, you need to trace through the code mentally, paying close attention to operator precedence, type conversions, and the precise behaviour of C++ string and iostream operations. These kinds of questions are common in technical interviews because they reveal whether a candidate has truly internalized the language they claim to know, rather than just memorizing patterns.

• String concatenation and operator overloading
• Output stream semantics
• Type coercion and implicit conversions