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Duck Duck Goose is a medium quant interview question on language knowledge in Python.
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This is a medium-difficulty Python question that assesses your familiarity with language semantics and how the interpreter handles specific constructs. Rather than testing an algorithm or data structure, it requires you to trace through code mentally and predict its exact output.
Questions like this appear in technical interviews because they reveal whether a candidate has built intuition about Python's behaviour through hands-on experience, or is merely pattern-matching. The skill being tested is the ability to read unfamiliar or subtly tricky code and reason about its execution without running it—a valuable habit in code review and debugging.