Data Science Quiz

Which of the following is a type of data?

• Numerical

• Categorical

• Ordinal

• All of the above

What is data preprocessing?

• Process of creating new data

• Process of cleaning and preparing data for analysis

• Process of deleting unwanted data

• Process of visualizing data

Which of the following is NOT a type of data visualization?

• Histogram

• Scatter Plot

• Bar Chart

• Data Cleaning

What does data cleaning involve?

• Removing duplicate records

• Filling missing values

• Correcting inconsistencies

• All of the above

Which of the following is a common data transformation technique?

• Normalization

• Tokenization

• Visualization

• None of the above

What is the primary purpose of data integration?

• To clean data

• To combine data from multiple sources

• To delete unnecessary records

• To visualize data

Which of these is an example of attribute selection?

• Removing irrelevant attributes

• Adding new attributes

• Changing data types

• None of the above

Which type of attribute has a meaningful zero point?

• Ordinal

• Ratio

• Nominal

• Interval

Which algorithm is commonly used for clustering?

• K-Means

• Decision Trees

• Linear Regression

• Naïve Bayes

Data reduction helps in:

• Reducing dataset size while retaining important information

• Increasing dataset complexity

• Deleting all unused records

• Creating new attributes