Lemmatization and Stemming Quiz

Answers and explanations appear as you take the quiz.

1. What is the main difference between stemming and lemmatization?
   • Stemming uses crude suffix-stripping rules, while lemmatization maps words to real dictionary base forms
   • Stemming uses dictionaries; lemmatization uses rules
   • They are identical processes
   • Stemming only works on numbers
2. What might the Porter stemmer output for the word 'studies'?
   • study
   • studi
   • studied
   • student
3. When 'better' is used as a comparative adjective, which lemma may a lemmatizer return?
   • Betterness
   • Bet
   • Good
   • Wellness
4. Why does a lemmatizer often need part-of-speech information?
   • To count letters
   • To translate the word
   • To capitalize the word
   • To choose the correct lemma, since the same spelling can be a noun or verb
5. Which is generally TRUE about stemming compared to lemmatization?
   • Stemming is faster but less accurate
   • Stemming is slower and more accurate
   • Stemming always produces dictionary words
   • Stemming requires WordNet
6. What practical benefit do both techniques share?
   • They translate text
   • They reduce vocabulary size by merging word variants
   • They add new words
   • They encrypt the text
7. What does byte-pair encoding do when constructing subword units?
   • It strips every suffix using a fixed Porter rule
   • It assigns every word a single pronunciation
   • It iteratively merges frequent adjacent symbols into larger units
   • It replaces all tokens with part-of-speech labels
8. Why should stemming or lemmatization tools be checked separately for different languages?
   • Every language uses the same suffix rules
   • Lemmatizers can process only English verbs
   • Stemming produces identical output for every script
   • Morphology and useful normalization rules vary by language