AI MCQ #635: What is a top-down parser?

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Q635. What is a top-down parser?

  • a) Begins by hypothesizing a sentence (the symbol S) and successively predicting lower level
  • b) Begins by hypothesizing a sentence (the symbol S) and successively predicting upper level
  • c) Begins by hypothesizing lower level constituents and successively predicting a sentence (the
  • d) Begins by hypothesizing upper level constituents and successively predicting a sentence (the

✅ Correct Answer: A) Begins by hypothesizing a sentence (the symbol S) and successively predicting lower level

Explanation: A top-down parser begins by hypothesizing a sentence (the symbol S) and successively predicting lower level constituents until individual pre-terminal symbols are written.