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Deep Learning, End Term

September 2025 term, 21 Dec 2025, Set 1

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Question 1

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What is a co-occurrence matrix in the context of Natural Language Processing?

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A.
A matrix representing similarity scores between documents
B.
A matrix where rows and columns represent words, and each cell indicates how frequently two words appear together in a context
C.
A matrix that stores only the most frequent word in each document
D.
A neural network used to compute word embeddings directly

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What is a co-occurrence matrix in the context of Natural Language Processing? What is the primary advantage of word embeddings compared to one-hot encoding? Which of the following is not true about multi-head cross attention?