Podcast
Questions and Answers
What is a data warehouse?
What is a data warehouse?
- A database containing integrated, aggregated, and structured data from multiple operational systems (correct)
- A database containing data from a single operational system
- A database containing unstructured data from multiple operational systems
- A database containing randomly collected data from various sources
According to William Inmon, what are the characteristics of a data warehouse?
According to William Inmon, what are the characteristics of a data warehouse?
- Subject-oriented, isolated, static, and volatile
- Real-time, static, non-integrated, and dynamic
- Real-time, non-integrated, variable, and volatile
- Subject-oriented, integrated, time-variant, and nonvolatile (correct)
How is a data warehouse organized according to subject orientation?
How is a data warehouse organized according to subject orientation?
- Focused on collecting unstructured data for reports
- Organized around random subjects without any specific focus
- Organized around daily operations and transaction processing
- Focused on modeling and analysis of data for decision-makers (correct)
What is the characteristic of a data warehouse being 'integrated'?
What is the characteristic of a data warehouse being 'integrated'?
What is the purpose of a subject-oriented data warehouse?
What is the purpose of a subject-oriented data warehouse?
Why is consistency in naming conventions and encoding structures important in a data warehouse?
Why is consistency in naming conventions and encoding structures important in a data warehouse?
What is the key difference in the time horizon between operational systems and data warehouse data?
What is the key difference in the time horizon between operational systems and data warehouse data?
What is a characteristic of the key structure in the data warehouse when it comes to time?
What is a characteristic of the key structure in the data warehouse when it comes to time?
What is a characteristic of data warehouse environment in terms of operational update of data?
What is a characteristic of data warehouse environment in terms of operational update of data?
What are the minimal operations required for data accessing in the data warehouse environment?
What are the minimal operations required for data accessing in the data warehouse environment?
Why does decision support require historical data which operational databases do not typically maintain?
Why does decision support require historical data which operational databases do not typically maintain?
What is the main reason for requiring consolidation (aggregation, summarization) of data from heterogeneous sources in decision support systems?
What is the main reason for requiring consolidation (aggregation, summarization) of data from heterogeneous sources in decision support systems?
What is an example of an Online Analytical Processing (OLAP) server type that directly implements multidimensional data and operations?
What is an example of an Online Analytical Processing (OLAP) server type that directly implements multidimensional data and operations?
What is the primary purpose of a Data Mart within an organization?
What is the primary purpose of a Data Mart within an organization?
What type of server is almost always a relational DBMS, rarely flat files, in the Three-Tier Decision Support Systems architecture?
What type of server is almost always a relational DBMS, rarely flat files, in the Three-Tier Decision Support Systems architecture?
