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Question $4$:

Assume you know the following probabilities:

P$()$

P$($ i $|)$

P$($ want $|$ i $)$

P$($ to $|$ want $)$

P$($ fly $|$ to $)$

P$(|$ fly $)$

P$()$

How would you use these to compute $($an approximation of$)$P$($ i want to fly $)?$

A$.$ P$()*$ P$($ fly $|$ to $)*$ P$($ to $|$ want $)*$ P$($ want $|$ i $)*$ P $($ i $|)$

B$.$ P $($ i $|)*$ P$($ want $|$ i $)*$P$($ to $|$ want $)*($ fly $|$ to $)$

C$.$ P$(|$ fly $)*$ P$($ fly $|$ to $)*$ P$($ to $|$ want $)*$ P$($ want $|$ i $)*$ P $($ i $|)*$ P$()$

D$.$ P$($want $|$ i$)*$ P$($ to $|$ want $)*$ P$($ fly $|$ to $)$

Question $5$:

Which one of the following techniques can be used for keyword normalization in NLP$,$ the process of converting a keyword into its base form?

A$.$ Tokenization

B$.$ Relative frequency

C$.$ Lemmatization

D$.$ N$-$grams

Question $6$:

How many N$-$grams phrases can be generated from any sentence with M words?

A$.$ M$-$N$+2$

B$.$ M$-$N$-1$

C$.$ M$-$N

D$.$ M$-$N$+1$

Question $7$:

All the stop words, such as a$,$ an$,$ the, are removed by default. The stop words cannot be customized to define for removal.

A$.$ True

B$.$ False