Data Warehousing

Q1. The @active data warehouse architecture includes What?

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

Q2. 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

Q3. A goal of data mining includes What?

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

Q4. which of the following are Fact tables?

Partially denoralized
Completely denoralized
Completely normalized
Partially normalized

Q5. Which of the following is a data warehouse?

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

Q6. The extract process is?

Capturing a subset of the data contained in various operational systems
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

Q7. which of the following types of tables is a snowflake schema?

All of the above
Fact
Dimension
Helper

Q8. 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 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 altered or deleted once they have been added

Q9. The generic two-level data warehouse architecture includes?

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

Q10. Data transformation includes?

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

Q11. 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

Q12. Which of the following is data scrubbing?

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

Q13. Which of the following is an operational system?

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
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

Q14. What does a multifield transformation?

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

Q15. The load and index is?

A process to load the data in 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
A process to reject data from the data warehouse and to create the necessary indexes

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Introduction To Data Warehousing

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