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?

<p>A denormalized data store that contains fact tables and their corresponding dimension tables (B)</p> Signup and view all the answers

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

<p>To combine data from multiple transactional systems into a single integrated data store (D)</p> Signup and view all the answers

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

<p>To change the data to suit the format and criteria of the target system (A)</p> Signup and view all the answers

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

<p>To provide a common set of dimensions that can be used across multiple fact tables (D)</p> Signup and view all the answers

What is the primary use of data warehouses today?

<p>For business intelligence and data mining (D)</p> Signup and view all the answers

What is the relationship between data warehousing and business intelligence?

<p>Many vendors prefer to use the term 'business intelligence' rather than 'data warehousing' (C)</p> Signup and view all the answers

What is the main purpose of a dimensional data store?

<p>To provide a denormalized, conformed data structure for business intelligence and reporting (B)</p> Signup and view all the answers

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