Data Analytics

What is data mining?

• A method to clean data

• A process of extracting patterns from large data sets
  

• A process of extracting patterns from large data sets
  

• A form of machine learning
  

What is the main purpose of A/B testing?

• To create data models

• To compare two versions of an element for better performance

• To extract patterns from data

• To visualize relationships between entities

Which of the following is a type of visual analysis?

• Predictive modeling
  

• Spatial data mapping

• Data mining

• Machine learning

In distributed data processing, how are tasks executed?

• On a single machine with multiple cores

• Simultaneously on physically separate machines

• Sequentially on one machine

• Using a batch-processing system

Which technology is commonly used in batch processing?

• Python

• Spark

• OLAP systems

• Hive
  

What is the key difference between parallel and distributed data processing?

• Parallel processing runs on multiple machines, distributed runs on one machine
  

• Parallel processing involves sub-tasks on one machine, distributed on multiple machines

• Distributed processing scales horizontally, while parallel processing does not
  

• Distributed processing uses batch mode, parallel uses real-time

Which analysis technique is focused on relationships between entities in a network?

• Heat map

• Network graph

• Machine learning
  

• Data mining

What does a heat map represent?

• Geographical data

• Color-coded values

• Entity relationships

• Predictions based on trends

Which tool can handle large datasets using distributed processing?

• Hadoop

• Tableau
  

• Python

• Power BI

Which of the following best describes machine learning?

• A tool for visualizing data

• A method for running batch processes

• An algorithm-driven process for identifying patterns

• A technology for mapping geospatial data