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Data Warehouse Development Methods: Waterfall Methodology Steps

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Data Warehouse Development Methods: Waterfall Methodology Steps

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Questions and Answers

What is the primary purpose of a data warehouse?

To store transactional data for day-to-day operations

To provide a platform for data mining and predictive analytics

To serve as a backup and disaster recovery solution

To consolidate data from multiple sources for business intelligence (correct)

What is the key difference between a data warehouse and a transactional system?

Data in the data warehouse is used for reporting, while transactional data is used for operations

Data in the data warehouse is integrated, while transactional data is siloed (correct)

Data in the data warehouse is normalized, while transactional data is denormalized

Data in the data warehouse is historical, while transactional data is real-time

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

To identify and correct dirty data before it is loaded into the warehouse (correct)

To transform the data to fit the format and criteria of the target system

To provide a platform for business intelligence and data mining

To consolidate data from multiple transactional systems into the data warehouse

What is a dimensional data mart?

A denormalized data store that contains fact tables and their corresponding dimension tables Signup and view all the answers

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

To combine data from multiple transactional systems into a single integrated data store Signup and view all the answers

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

To change the data to suit the format and criteria of the target system Signup and view all the answers

What is the purpose of conformed dimensions in a dimensional data store?

To provide a common set of dimensions that can be used across multiple fact tables Signup and view all the answers

What is the primary use of data warehouses today?

For business intelligence and data mining Signup and view all the answers

What is the relationship between data warehousing and business intelligence?

Many vendors prefer to use the term 'business intelligence' rather than 'data warehousing' Signup and view all the answers

What is the main purpose of a dimensional data store?

To provide a denormalized, conformed data structure for business intelligence and reporting Signup and view all the answers