DMA QUIZ

What is the main goal of data mining?

• To store large amounts of data

• To retrieve data efficiently from databases

• To discover patterns and knowledge from large datasets

• To secure data from unauthorized access

Which of the following is NOT a major data mining technique?

• Classification

• Clustering

• Compression

• Association Rule Mining

In data mining, which of the following represents the process of identifying outliers or rare patterns in data?

• Classification

• Clustering

• Anomaly Detection

• Regression

What is the main purpose of data preprocessing in data mining?

• To generate new data from scratch

• To clean, transform, and prepare data for analysis

• To store data in a database

• To eliminate the need for machine learning models

Which of the following is NOT a common data preprocessing technique?

• Data Cleaning

• Data Integration

• Data Compression

• Data Transformation

What is the process of filling in missing values in a dataset called?

• Data Integration

• Data Normalization

• Data Imputation

• Data Reduction

Which technique is used to scale numerical data within a specific range, such as [0,1] or [-1,1]?

• Data Discretization

• Data Normalization

• Data Aggregation

• Data Sampling

What is the main goal of data cleaning in data mining?

• To increase the size of the dataset

• To remove inconsistencies and errors in the data

• To generate new data automatically

• To reduce the number of attributes in a dataset

Which of the following is NOT a common data cleaning technique?

• Handling missing values

• Removing duplicate records

• Adding noise to data

• Correcting inconsistent data

What is the best way to handle missing values in a dataset?

• Ignore them completely

• Delete the entire dataset

• Use data imputation techniques like mean, median, or mode replacement

• Randomly assign values