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Data Warehousing and Data Mining Quiz

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Questions and Answers

What is the key difference between data in a data warehouse and data in the operational environment?

Data in the warehouse is organized for day-to-day operations, analysis, and reporting (correct)
Data in the warehouse is unorganized and difficult to access
Data in the operational environment is structured for long-term storage and historical analysis
Data in the operational environment is clustered to facilitate business insights and forecasts

What is the main purpose of data warehousing?

To manage data for day-to-day operations and reporting
To analyze data and generate forecasts based on the trends over time
To serve as the primary database for operational business systems
To collect, organize, and manage data from different sources to provide meaningful business insights (correct)

What is the primary goal of mapping the data warehouse to a multiprocessor architecture?

To enhance real-time transaction processing capabilities
To reduce the storage space required for the data warehouse
To improve query performance and scalability (correct)
To simplify the process of data extraction and transformation

What function does a data warehouse serve in today's business environment?

Enabling reliable reporting and analysis of large volumes of data (A) Signup and view all the answers

What is the role of metadata in a data warehouse?

It provides information about the structure and meaning of the data (C) Signup and view all the answers

How does data warehousing contribute to business decision-making?

By providing meaningful business insights based on trends over time (D) Signup and view all the answers

What is the foundation of the data warehousing environment?

Data warehouse database (D) Signup and view all the answers

Which components are mainly used for performing conversions, summarizations, and all the changes needed to transform data into a unified format in the data warehouse?

Sourcing, acquisition, clean-up and transformation tools (C) Signup and view all the answers

What are the challenges that the Extract, Transform, and Load (ETL) tools have to deal with?

Database and data heterogeneity (D) Signup and view all the answers

What functionality does the Extract, Transform and Load (ETL) Tools include?

All of the above (D) Signup and view all the answers

Which type of database is used to overcome limitations placed because of the relational Data Warehouse Models?

Multidimensional databases (MDDBs) (C) Signup and view all the answers