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Understanding C++ language semantics and code behavior

This medium-difficulty C++ question tests your grasp of language fundamentals by asking you to trace through a code snippet and predict its output. It rewards precise knowledge of operator precedence, scope rules, type conversions, and standard library behavior—the kinds of details that separate candidates who code fluently from those who guess.

To solve problems like this, you need to read the code systematically, account for any implicit type conversions or side effects, and mentally execute the sequence of operations. Interview panels use these questions to identify gaps in your working knowledge of C++ and to see whether you reason through ambiguity carefully or assume.

• Operator precedence and associativity
• Type promotion and conversion rules
• Scope and lifetime of variables
• Standard library function behavior