Course5week2, Question about Quiz of Natural Language Processing & Word Embeddings

Course Q&A Deep Learning Specialization Sequence Models
1

Is there any correct answer for the question below?

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Hope you don’t mind I take this picture of the question because of the random generation of questions in the Quiz system. I am confused about the answer because
I think there is no correct answer below and even the question has error because the operation between the embedding matrix and one-hot vector should be matrix multiplication ,that is, A dot o4567 but A*o4567 looks like element-wise multiplication. I look forward to your verification. :slightly_smiling_face:

1 Like
2

Yes, I can verify that one of the answers is true.

3

Can you please explain why because I feel confused about the question when I look at the slice below? :slightly_smiling_face:

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4

Consider how many non-zero results you will get when you multiply by a one-hot vector. Only one element of the vector isn’t a zero.

5

Thank you! I see, because we can get the embedding of word by using index directly. So that way is time consuming.