Clustering Quiz (Easy) with detailed answers

1. Question

Clustering is a:

Supervised learning technique

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Unsupervised learning technique

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Reinforcement learning technique

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Dimensionality reduction technique

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2. Question

What is the primary goal of clustering?

To predict future trends based on past data

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To classify data into predefined categories

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To group together similar data points based on certain characteristics

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To establish a cause-and-effect relationship between variables

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3. Question

Which of the following is not a clustering algorithm?

K-Means

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DBSCAN

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Agglomerative Clustering

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Decision Trees

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4. Question

Silhouette score in clustering is used to:

Measure the similarity within a cluster

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Determine the optimal number of clusters

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Calculate the distance between data points

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Predict future data points

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5. Question

In clustering, ‘outliers’ are:

Central points of a cluster

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Data points that belong to two clusters

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Data points that do not fit well into any cluster

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The most common data points

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6. Question

In clustering, the term ‘centroid’ refers to:

The average distance between clusters

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The middle point of a data cluster

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The farthest point in a cluster

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The density center of a cluster

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7. Question

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

K-Means clustering

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Hierarchical clustering

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DBSCAN

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Mean Shift

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8. Question

Which is a characteristic of hierarchical clustering?

Fixed number of clusters

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Suitable for very large datasets

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Based on density of data points

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No need to specify the number of clusters in advance

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9. Question

What is the purpose of normalization in the context of clustering?

Enhances interpretability of cluster assignments

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Reduces the dimensionality of the data

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Adjusts for differences in the scale of features

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Increases the density of clusters

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10. Question

Which of the following preprocessing steps is NOT considered good practice before clustering?

Standardization of features

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Outlier removal

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Feature scaling

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Data augmentation

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Clustering Quiz (Easy)

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