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1What is the walrus operator (:=), and in what scenarios does it improve code clarity?Intermediate2What are type hints, and does Python enforce them at runtime?Intermediate3What is a Protocol in the typing module, and how does it enable structural typing ("duck typing" with static checks)?Advanced4How do positional-only (/) and keyword-only (*) parameter markers refine function signatures?Intermediate5What is the difference between Optional[X], Union[X, Y], and the newer X | Y syntax (PEP 604)?Intermediate
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