MLA Final Quiz: Clustering Algorithms and Unsupervised Learning
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Questions and Answers

Which algorithm is sensitive to the initialization of cluster centroids?

  • DBSCAN
  • Hierarchical clustering
  • K-means (correct)
  • Decision Trees
  • Which algorithm is used for feature selection?

  • Hierarchical clustering
  • K-means
  • Decision Trees (correct)
  • DBSCAN
  • Which algorithm is used for imputing missing values?

  • DBSCAN
  • K-means (correct)
  • Hierarchical clustering
  • Decision Trees
  • Which algorithm is prone to the curse of dimensionality?

    <p>t-SNE</p> Signup and view all the answers

    Which algorithm uses a dendrogram to represent the hierarchy of clusters?

    <p>Hierarchical clustering</p> Signup and view all the answers

    Which algorithm is computationally expensive for large datasets?

    <p>t-SNE</p> Signup and view all the answers

    Which algorithm is used for reducing the number of features?

    <p>PCA</p> Signup and view all the answers

    Which algorithm has a parameter called 'min_samples'?

    <p>DBSCAN</p> Signup and view all the answers

    Which algorithm can handle non-convex clusters?

    <p>DBSCAN</p> Signup and view all the answers

    Which algorithm is based on the concept of proximity?

    <p>DBSCAN</p> Signup and view all the answers

    What is the main drawback of K-means clustering?

    <p>It requires a predetermined number of clusters</p> Signup and view all the answers

    Which algorithm is sensitive to the choice of initial cluster centroids?

    <p>K-means</p> Signup and view all the answers

    What is the primary use of DBSCAN?

    <p>Clustering</p> Signup and view all the answers

    Which algorithm is not a clustering algorithm?

    <p>Decision Trees</p> Signup and view all the answers

    What problem is t-SNE designed to solve?

    <p>Dimensionality reduction</p> Signup and view all the answers

    In which type of learning is the number of clusters not pre-specified?

    <p>Unsupervised learning</p> Signup and view all the answers

    Which algorithm is sensitive to outliers?

    <p>DBSCAN</p> Signup and view all the answers

    What does the perplexity parameter control in t-SNE?

    <p>Local neighborhood size</p> Signup and view all the answers

    In Random Forest, what is the main purpose of using Decision Trees?

    <p>To reduce variance</p> Signup and view all the answers

    Which clustering algorithm is not sensitive to the order of input data points?

    <p>DBSCAN</p> Signup and view all the answers

    Among the algorithms listed, which one can handle non-linear data effectively?

    <p>Decision Trees</p> Signup and view all the answers

    What does the 'k' in K-means clustering represent?

    <p>Number of clusters</p> Signup and view all the answers

    Which algorithm is suitable for visualizing high-dimensional data in lower dimensions?

    <p>t-SNE</p> Signup and view all the answers

    In Decision Trees, what is the primary purpose of using entropy?

    <p>To measure impurity</p> Signup and view all the answers

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