Star schema is suited to online transaction processing, and therefore is generally used in operational systems, operational data stores, or an EDW. True False TRUE ANSWER : ? YOUR ANSWER : ?
A multifield transformation does which of the following? Converts data from one field into multiple fields Converts data from multiple fields into one field Converts data from multiple fields into multiple fields All of these TRUE ANSWER : ? YOUR ANSWER : ?
Transient data is which of the following? Data that are never altered or deleted once they have been added Data in which changes to existing records cause the previous version of the records to be eliminated Data that are never deleted once they have been added Data in which changes to existing records do not cause the previous version of the records to be eliminated TRUE ANSWER : ? YOUR ANSWER : ?
An operational system is which of the following? A system that is used to run the business in real time and is based on historical data. A system that is used to support decision making and is based on historical data. A system that is used to run the business in real time and is based on current data. A system that is used to support decision making and is based on current data. TRUE ANSWER : ? YOUR ANSWER : ?
The load and index is which of the following? A process to load the data in the data warehouse and to create the necessary indexes A process to reject data from the data warehouse and to create the necessary indexes A process to upgrade the quality of data after it is moved into a data warehouse A process to upgrade the quality of data before it is moved into a data warehouse TRUE ANSWER : ? YOUR ANSWER : ?
The role of the ETL process is to identify erroneous data and to fix them. True False TRUE ANSWER : ? YOUR ANSWER : ?
A star schema has what type of relationship between a dimension and fact table? One-to-one Many-to-many All of these One-to-many TRUE ANSWER : ? YOUR ANSWER : ?
The extract process is which of the following? Capturing all of the data contained in various operational systems Capturing a subset of the data contained in various decision support systems Capturing all of the data contained in various decision support systems Capturing a subset of the data contained in various operational systems TRUE ANSWER : ? YOUR ANSWER : ?
Data in operational systems are typically fragmented and inconsistent. True False TRUE ANSWER : ? YOUR ANSWER : ?
A data warehouse is which of the following? Can be updated by end users. Contains numerous naming conventions and formats. Organized around important subject areas. Contains only current data. TRUE ANSWER : ? YOUR ANSWER : ?