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Data Warehousing and OLAP Technology Quiz

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Questions and Answers

What is the main purpose of a data warehouse?

On-line analytical processing (OLAP) tools for interactive multidimensional data analysis (correct)
Heterogeneous database management
Data selection and data cleaning
Data summarization and integration

Which step can be considered as an important preprocessing step for data mining?

Data summarization
Heterogeneous database management
Data selection and cleaning (correct)
Data integration

What does the FACT table in a data warehouse contain?

Heterogeneous database details
Multi-dimensional data model
Data related to dimensions and measures (correct)
Information about data summarization

What feature does a data warehouse provide for interactive analysis?

On-line analytical processing (OLAP) tools (D) Signup and view all the answers

In a data warehouse, what is considered as an important step for providing clean data for analysis?

Data selection and cleaning (B) Signup and view all the answers

What is the primary purpose of a data warehouse?

To provide historical data for analysis in decision-making processes (B) Signup and view all the answers

What does 'subject-oriented' mean in the context of a data warehouse?

Organized around major subjects like customer and product (C) Signup and view all the answers

What is a key aspect of data integration in a data warehouse?

Consistency of attribute names and data types (B) Signup and view all the answers

What is the purpose of data cleaning in a data warehouse?

To clean incomplete or logically inconsistent tuples (B) Signup and view all the answers

What does OLAP stand for in the context of a data warehouse?

Online Analytical Processing (B) Signup and view all the answers

What is the primary purpose of on-line analytical processing (OLAP) tools in a data warehouse?

To provide tools for interactive multidimensional data analysis (A) Signup and view all the answers

In the context of a data warehouse, what does 'multi-dimensional data model' refer to?

A model that organizes data into dimensions and measures for complex analysis (C) Signup and view all the answers

What is the main purpose of data summarization in the context of a data warehouse?

To provide a high-level overview of the data for faster analysis (C) Signup and view all the answers

What is a key aspect of data integration in a data warehouse?

Combining data from multiple sources into a cohesive format (A) Signup and view all the answers

What is a significant benefit of a data warehouse for data mining?

Enabling interactive analysis through OLAP tools (A) Signup and view all the answers

What is the primary function of a data warehouse?

To provide a platform for consolidated, historical data for analysis (C) Signup and view all the answers

What does 'subject-oriented' mean in the context of a data warehouse?

Organizing data around major subjects for easy access (D) Signup and view all the answers

What is one of the key aspects of data integration in a data warehouse?

Consistency in naming conventions and encoding structures among different data sources (D) Signup and view all the answers

What is the purpose of data cleaning in a data warehouse?

To clean tuples which are incomplete or logically inconsistent (B) Signup and view all the answers

What does OLAP stand for in the context of a data warehouse?

Online Analytical Processing (B) Signup and view all the answers

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Data Warehousing and OLAP Technology Quiz

Choose a study mode

Podcast

Questions and Answers

What is the main purpose of a data warehouse?

Which step can be considered as an important preprocessing step for data mining?

What does the FACT table in a data warehouse contain?

What feature does a data warehouse provide for interactive analysis?

In a data warehouse, what is considered as an important step for providing clean data for analysis?

What is the primary purpose of a data warehouse?

What does 'subject-oriented' mean in the context of a data warehouse?

What is a key aspect of data integration in a data warehouse?

What is the purpose of data cleaning in a data warehouse?

What does OLAP stand for in the context of a data warehouse?

What is the primary purpose of on-line analytical processing (OLAP) tools in a data warehouse?

In the context of a data warehouse, what does 'multi-dimensional data model' refer to?

What is the main purpose of data summarization in the context of a data warehouse?

What is a key aspect of data integration in a data warehouse?

What is a significant benefit of a data warehouse for data mining?

What is the primary function of a data warehouse?

What does 'subject-oriented' mean in the context of a data warehouse?

What is one of the key aspects of data integration in a data warehouse?

What is the purpose of data cleaning in a data warehouse?

What does OLAP stand for in the context of a data warehouse?

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