Data Science Quiz

What is the main objective of data collection?

• To analyze data for fun

• To gather irrelevant data

• To confuse business decisions

• To gather information-rich and reliable data

Which data collection strategy involves researchers observing a situation and recording the findings?

• Online Tracking

• Interviews

• Surveys

• Observation

What is the process of converting data from one format to another?

• Data Cleaning

• Data Integration

• Data Transformation

• Data Pre-Processing

Which data transformation technique involves reducing the size of data by encoding mechanisms?

• Data Compression

• Dimensionality Reduction

• Data Quality Assessment

• Numerosity Reduction

What is the main task of the Pandas DataFrame.transform() function?

• To create a new DataFrame

• To transform the data

• To summarize the data

• To delete the DataFrame

Which method of data reduction involves replacing the actual data with mathematical models?

• Data Quality Assessment

• Data Compression

• Numerosity Reduction

• Dimensionality Reduction

What is the process of fixing or removing incorrect, corrupted, or incomplete data within a dataset?

• Data Transformation

• Data Reduction

• Data Integration

• Data Cleaning

Which data collection method involves conducting interviews with a group of people who have something in common?

• Observation

• Interviews

• Surveys

• Focus Groups

What is the purpose of data reduction?

• To increase data storage costs

• To complicate decision-making

• To make analysis harder

• To reduce data storage and analysis costs

Which data preprocessing step involves combining data from different sources into a single unified view?

• Data Cleaning

• Data Transformation

• Data Integration

• Data Reduction