WS2324 S2 & S10 Formative Assessment

What is the primary goal of data mining?

• To extract data from various sources

• To clean and preprocess data

• To discover patterns and insights from data

• To visualize data for better understanding

Which of the following is a supervised learning algorithm?

• K means

• Decision Tree

• DBSCAN

• Apriori

What is cross-validation used for in model selection?

• To train the model on multiple subsets of the data

• To split the dataset into training and testing sets

• To evaluate the performance of the model on unseen data

• To select the optimal hyperparameters for the model

What is Principal Component Analysis (PCA) used for in machine learning?

• Feature selection

• Feature extraction

• Model training

• Model evaluation

Which of the following is NOT an application of LDA?

• Face recognition

• Sentiment analysis

• Feature extraction

• Anomaly detection

Which of the following is NOT a step-in data preprocessing?

• Data cleaning

• Data visualization

• Data integration

• Data transformation

Which of the following is a common type of regression?

• K-means regression

• Logistic regression

• Decision tree regression

• Hierarchical regression

In SVM, what are support vectors?

• Data points that are correctly classified

• Data points that are incorrectly classified

• Data points that lie closest to the decision boundary

• Data points that are outliers

What is the purpose of conducting multivariate analysis?

• To summarize the distribution of a single variable

• To identify relationships between variables

• To predict the outcome variable

• To reduce the dimensionality of the dataset

Which layer of a neural network typically applies the activation function to the weighted sum of inputs?

• Input layer

• Output layer

• Hidden layer

• Dropout layer