Natural Language Processing Nptel Week 1 Quiz Answers

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Natural Language Processing Nptel Week 1 Quiz Answers (Jan-Apr 2025)

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1. In a corpus, you found that the word with rank 4th has a frequency of 250. What can be the best guess for the rank of a word with frequency 125?

1. 2
2. 4
3. 6
4. 8

Answer :- b

2. In the sentence, “In Delhi I took my hat off. But I can’t put it back on.”, total number of
word tokens and word types are:

1. 14, 13
2. 13, 14
3. 15, 14
4. 14, 15

Answer :- a

3. Let the rank of two words, w1 and w2, in a corpus be 1600 and 100, respectively. Let m1 and m2 represent the number of meanings of w1 and w2 respectively. The ratio m1 : m2 would tentatively be

1. 1:4
2. 4:1
3. 1:2
4. 2:1

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4. What is the valid range of type-token ratio of any text corpus?

TTRE(0,1] (excluding zero)
TTRe[0,1]
TTRE[-1,1]
TTRE[0, +∞] (any non-negative number)

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5. If first corpus has TTR₁ = 0.06 and second corpus has TTR₂ = 0.105, where TTR₁ and TTR₂ epresents type/token ratio in first and second corpus respectively, then

1. First corpus has more tendency to use different words.
2. Second corpus has more tendency to use different words.
3. Both a and b
4. None of these

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6. Which of the following is/are true for the English Language?

1. Lemmatization works only on inflectional morphemes and Stemming works only on derivational morphemes.
2. The outputs of lemmatization and stemming for the same word might differ.
3. Output of lemmatization are always real words
4. Output of stemming are always real words

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7. An advantage of Porter stemmer over a full morphological parser?