Question Answering Quiz

Answers and explanations appear as you take the quiz.

1. What does an extractive question answering system do?
   • Selects the exact span of text in a passage that answers the question
   • Writes a brand-new answer in its own words
   • Translates the question into another language
   • Ranks web pages by popularity
2. What evidence-access distinction separates closed-book QA from an open-book QA setting?
   • Open-book systems are forbidden to read documents
   • Closed-book systems must always be more accurate
   • Closed-book uses model parameters without external lookup; open-book can use supplied or retrieved documents
   • Open-book systems cannot include a language model
3. How can retrieval-augmented generation support a QA answer?
   • By guaranteeing every retrieved passage is correct
   • By eliminating the need to interpret any passage
   • By automatically proving every output claim true
   • By providing retrieved passages as evidence for generation
4. Which boundary scores can an extractive QA head produce when selecting an answer span?
   • Only a translation score for French output
   • Scores for possible answer-start and answer-end positions
   • Only a grammatical noun-or-verb label
   • Only the alphabetical rank of each word
5. What is a sign of a well-designed QA system when the passage lacks the answer?
   • It invents a plausible-sounding answer anyway
   • It returns the entire passage
   • It recognizes the question is unanswerable and says so
   • It crashes
6. How does generative QA differ from requiring an extractive source span?
   • It produces answer text rather than requiring an exact span from the passage
   • It is restricted to one yes-or-no label in every task
   • It never outputs any words present in a source
   • It must output only a highlighted passage boundary
7. In SQuAD-style QA evaluation, what can token-overlap F1 provide that exact match alone does not?
   • Proof that every claimed fact is true
   • Partial credit for answer words overlapping a reference
   • A guarantee that no answer was copied
   • The measured power usage of a server
8. Why evaluate a QA system on paraphrased questions that preserve the intended meaning?
   • To guarantee that every new paraphrase has a different answer
   • To remove all passage evidence from every evaluation
   • To replace answer quality with filename length
   • To test sensitivity to changes in question wording