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Iterators and Generators · interview question

A bug appears around yield and custom generators. What is the strongest first debugging move?

Multiple choiceMediumchapter-8-curatedpremiumiterators-and-generatorsyield-and-custom-generators
python
def batched(rows: list[dict], size: int):
    for index in range(0, len(rows), size):
        yield rows[index:index + size]
Choose one answer
Answer and explanation

Correct answer

D. Trace one concrete example, inspect the state transitions, and compare them to the intended rule before rewriting anything.

Why

That approach is reliable because it creates evidence. If the consumer immediately forces the whole generator into a list, the lazy design may be mostly decorative.

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