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What this C++ code-output question tests

This is a medium-difficulty C++ question that asks you to trace through a code snippet and predict its output. It probes your understanding of language semantics—how the compiler and runtime interpret expressions, control flow, and standard library behaviour.

Questions like this are common in technical interviews because they reveal whether you read code carefully, understand implicit type conversions and operator precedence, and can mentally execute a program without running it. The key is to work through the snippet line-by-line, paying close attention to edge cases and the exact semantics of each operation.

• Operator precedence and associativity
• Type conversions and promotion rules
• Standard library function behaviour
• Control flow and conditional logic