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What does the edit distance (Levenshtein distance) between two words measure?

easy📝 Conceptual Q11 of 15
NLP - Text Similarity and Search
What does the edit distance (Levenshtein distance) between two words measure?
AThe length difference between two words
BThe minimum number of single-character edits to change one word into the other
CThe number of common letters between two words
DThe number of vowels in both words combined
Step-by-Step Solution
Solution:

  1. Step 1: Understand the definition of edit distance

    Edit distance counts how many changes like insertions, deletions, or substitutions are needed to convert one word into another.

  2. Step 2: Compare options with the definition

    Only The minimum number of single-character edits to change one word into the other correctly describes this minimum number of single-character edits.

  3. Final Answer:

    The minimum number of single-character edits to change one word into the other -> Option B

  4. Quick Check:

    Edit distance = minimum edits [OK]
Quick Trick: Edit distance = smallest edits to match words [OK]
Common Mistakes:
MISTAKES
  • Confusing edit distance with common letters count
  • Thinking it measures length difference only
  • Mixing up vowels or letter counts

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