Data Warehousing

Q1. The load and index is?

A process to reject data from the data warehouse and to create the necessary indexes
A process to load the data in the data warehouse and to create the necessary indexes
A process to upgrade the quality of data before it is moved into a data warehouse
A process to upgrade the quality of data after it is moved into a data warehouse

Q2. which of the following types of tables is a snowflake schema?

Helper
All of the above
Dimension
Fact

Q3. What does a multifield transformation?

All of the above
Converts data from multiple fields into one field
Converts data from one field into multiple fields
Converts data from multiple fields into multiple fields

Q4. which of the following are Fact tables?

Partially normalized
Completely normalized
Partially denoralized
Completely denoralized

Q5. What is Reconciled data?

Data stored in one operational system in the organization
Current data intended to be the single source for all decision support systems
Data stored in the various operational systems throughout the organization
Data that has been selected and formatted for end-user support applications

Q6. The generic two-level data warehouse architecture includes?

All of the above
At least one data mart
Near real-time updates
Data that can extracted from numerous internal and external sources

Q7. what type of relationship between a dimension and fact table in a star schema?

All of the above
One-to-one
One-to-many
Many-to-many

Q8. The @active data warehouse architecture includes What?

Data that can extracted from numerous internal and external sources
All of the above
Near real-time updates
At least one data mart

Q9. Which of the following is an operational system?

A system that is used to run the business in real time and is based on current data
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 support decision making and is based on current data

Q10. The extract process is?

Capturing a subset of the data contained in various operational systems
Capturing all of the data contained in various decision support systems
Capturing a subset of the data contained in various decision support systems
Capturing all of the data contained in various operational systems

Q11. Which of the following is data scrubbing?

A process to load the data in the data warehouse and to create the necessary indexes
A process to upgrade the quality of data before it is moved into a data warehouse
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

Q12. Data transformation includes?

A process to change data from a summary level to a detailed level
Joining data from one source into various sources of data
A process to change data from a detailed level to a summary level
Separating data from one source into various sources of data

Q13. A goal of data mining includes What?

To create a new data warehouse
To explain some observed event or condition
To confirm that data exists
To analyze data for expected relationships

Q14. What is Transient data?

Data in which changes to existing records cause the previous version of the records to be eliminated
Data that are never altered or 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
Data that are never deleted once they have been added

Q15. Which of the following is a data warehouse?

Contains numerous naming conventions and formats
Can be updated by end users
Contains only current data
Organized around important subject areas

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Introduction To Data Warehousing

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