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What is the purpose of Word2Vec?

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שאלה #135741

		To generate synthetic text data
		To visualize word frequencies in a document
done		To capture semantic relationships between words
		To perform sentiment analysis on text data

נערך לפני 5 חודשים Shachar Adam

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Why is the representation of words in one-hot encoding not good enough?

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שאלה #135742

		One-hot encoding does not provide a compact representation for words
		One-hot encoding is only suitable for numerical data, not text
done		One-hot encoding does not capture semantic relationships between words

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Which step is NOT involved in preprocessing text data to lower the number of features and avoid overfitting?

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שאלה #135743

		Tokenize text
		Remove all punctuation and numbers and Replace all whitespaces by single spaces
		Remove stop words
		Lemmatize words
		Add multi-word named entities
		Add frequent bigrams
		Remove frequent and rare words
done		These are all steps that you can do in order to lower the number of features and avoid overfitting

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סמנו נכון/לא נכון: הנחת היסוד של LDA הוא שכל data point הוא התפלגות של topics

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שאלה #135744

done		נכון
		לא נכון

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סמנו נכון/לא נכון: ב-LDA המילים מומרות לוקטורים על מנת לבצע topic modelling

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שאלה #135745

		נכון
sentiment_very_satisfied		לא נכון

נערך לפני 5 חודשים Shachar Adam

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מיין לפי דירוג חדש ישן

What is the main objective of Latent Dirichlet Allocation (LDA) in natural language processing?

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שאלה #135746

		To determine the frequency of words in a corpus.
mood		To uncover hidden topics within a collection of documents.

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How does Latent Dirichlet Allocation (LDA) iteratively determine the topics present in a collection of documents?

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שאלה #135747

done		By initially assuming random topic assignments for each word, then refining these assignments based on the observed word distributions and topic proportions.
		By calculating the frequency of each word in the corpus and assigning topics based on word frequency.
		By iteratively adjusting the number of topics until the model converges to the optimal solution.

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What is Deep Learning?

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שאלה #135919

		A field of research that emerged in the winter of AI due to limited computational power.
done		Part of the Artificial Intelligence field focused on learning representations of data through hierarchical layers of neural networks.
		An approach to machine learning that relies on shallow neural networks with limited computational power.
		A learning algorithm that is effective only with small amounts of data.

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What aspect of the brain has inspired the architecture of neural networks in deep learning?

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שאלה #135921

		The number of neurons connected together
		The randomness of connections between neurons
done		The hierarchy of neurons sensitive to specific features

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What are some of the applications of deep learning?

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שאלה #135922

		Data visualization and analysis
done		Speech recognition, computer vision, and natural language processing

נערך לפני 5 חודשים Shachar Adam

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מיין לפי דירוג חדש ישן

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