Quiz5-26.5.25

In a bitmap index, each bit in the bitmap corresponds to:

• A column in the table
• A query
• A record (row) in the table
• The dataset

One advantage of bitmap indexes is:

• Higher storage requirements
• Complex maintenance
• Efficient space usage due to compression
• Better support for frequent updates

What is the primary goal of regression analysis?

• Classification of variables
• Determining causality
• Predicting the value of a dependent variable based on independent variables
• Reducing dimensionality

Which of the following is not a type of regression?

• Linear regression
• Logistic regression
• K-means regression
• Polynomial regression

In simple linear regression, the relationship between variables is modeled using:

• A cluster
• A tree
• A step function
• A straight line

What is a data cube in data warehousing?

• A set of unrelated tables
• A single flat file
• A multidimensional array of values
• A linear regression model

Classification is a type of:

• Unsupervised learning
• Supervised learning
• Reinforcement learning
• Regression

Which algorithm is typically used for classification?

• K-Means
• Apriori
• Decision Tree
• PCA

In classification, the goal is to predict:

• Continuous numeric value
• A probability score only
• A discrete label/class
• Missing values

The main goal of clustering is to:

• Classify data
• Summarize data
• Group similar data objects
• Predict future values