DSA Studio

Text Representation Checkpoint

Reconstruct a new trace and diagnose implementation mistakes. Select one answer per multiple-choice question.

Get every question correct to pass this checkpoint. You can review feedback, revise your answers, and submit again.

1. Under this exercise tokenizer, what are the tokens of "Blue, BLUE"?

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2. Training documents are ["a a b", "b"]. What is document frequency DF(a)? Enter an integer.
3. A word appears in every document. Under the unsmoothed exercise IDF, what weight does it get?

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4. Vocabulary contains only red. What TF vector does compute_tf("red gold",vocab) return?

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5. You reorder vocabulary indices but keep the old IDF vector. What breaks?

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6. Two documents are "dog bites person" and "person bites dog". Their BoW rows match. What does that show?

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