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Data Warehousing Fundamentals Quiz

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Questions and Answers

What is the purpose of an independent data mart?

To store summarized and normalized data

To serve a strategic business unit or a department (correct)

To integrate data from different sources in the organization

To store data temporarily for real-time analysis

What is the main characteristic of a data mart?

It is designed for real-time data analysis

It stores limited/relevant data for a specific department (correct)

It stores all available data in the organization

It is used as an interim area for a data warehouse

What is the role of an operational data store (ODS)?

To provide a temporary storage for operational data (correct)

To serve as an interim area for a data warehouse

To store historical data for long-term analysis

To integrate data from different data marts

What does 'nonvolatile' mean in the context of data warehousing?

Data that does not change once it is entered Signup and view all the answers

What is the key characteristic of a dependent data mart?

It is created directly from a data warehouse Signup and view all the answers

What is the key characteristic of an independent data mart?

It is a small data warehouse designed for a strategic business unit or a department Signup and view all the answers

What is the purpose of an operational data store (ODS)?

To serve as an interim area for a data warehouse Signup and view all the answers

What does 'nonvolatile' mean in the context of data warehousing?

Data is persistent and does not change frequently Signup and view all the answers

What is the main characteristic of a dependent data mart?

It is a subset that is created directly from a data warehouse Signup and view all the answers

What is the key characteristic of a data mart?

It stores only limited/relevant data for a specific department Signup and view all the answers

Study Notes

What is a Data Warehouse?

A physical repository where relational data is specially organized to provide enterprise-wide, cleansed data in a standardized format.
Designed to support DSS (Decision Support System) functions.
A collection of integrated, subject-oriented databases.
Each unit of data is non-volatile, meaning it remains unchanged once entered.
Each unit of data is relevant to some moment in time.
Provides a centralized location for storing and managing data from various sources.
Data is cleansed, transformed, and formatted into a standardized format for easy access and analysis.
Enables data analysis and reporting across different departments and levels of the organization.

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Description

Test your knowledge of data warehousing with this quiz. Learn about the purpose and structure of a data warehouse, which serves as a centralized repository of cleansed and standardized relational data for enterprise-wide use.