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Comma'on, on! is a medium quant interview question on language knowledge in Cpp, asked at Google.
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This is a medium-difficulty C++ language-knowledge question that tests your grasp of operator precedence, the comma operator, and how expressions evaluate in sequence. Google and other major tech firms include these in screening rounds to verify that candidates can read and reason about code semantically rather than guess at runtime behaviour.
Questions of this type reward close attention to how the comma operator chains expressions left-to-right, discarding intermediate results and returning only the final value. They also probe understanding of which operators bind tightest and how parentheses reshape evaluation order. The follow-up structure means you'll need to trace through logic established in a prior question to predict what prints.