Data Warehouse Multiple Choice Questions and Answers
Visit: https://www.gkseries.com/ for more questions
1. Which of the following is Data scrubbing?
A. A process to reject data from the data warehouse and to create the
necessary indexes
B. A process to load the data in the data warehouse and to create the
necessary indexes
C. A process to upgrade the quality of data after it is moved into a data
warehouse
D. A process to upgrade the quality of data before it is moved into a data
warehouse
Answer: Option D
2. The active data warehouse architecture includes which of the following?
A. At least one data mart
B. Data that can extracted from numerous internal and external sources
C. Near real-time updates
D. All of the above.
Answer: Option D
3. A goal of data mining includes which of the following?
A. To explain some observed event or condition
B. To proof data availability
C. To analyze data for expected relationships
D. To create a new data warehouse
Answer: Option A
4. An operational system is which of the following?
A. A system that is used to run the business in real time and is based on
historical data.
B. A system that is used to run the business in real time and is based on
current data.
C. A system that is used to support decision making and is based on current
data.
D. A system that is used to support decision making and is based on
historical data.
Answer: Option B
5. A data warehouse is which of the following?
A. Can be updated by end users.
B. Contains numerous naming conventions and formats.
C. Organized around important subject areas.
D. Contains only current data.
Answer: Option C
6. A snowflake schema is which of the following types of tables?
A. Fact
B. Dimension
C. Helper
D. All of the above
Answer: Option D
7. The generic two-level data warehouse architecture includes which of the
following?
A. At least one data mart
B. Data that can extracted from numerous internal and external sources
C. Near real-time updates
D. All of the above.
Answer: Option B
8. Data warehouse contains ................ data that is never found in the operational
environment.
A) normalized
B) informational
C) summary
D) denormalized
Answer: Option C
9. ................... are responsible for running queries and reports against data
warehouse tables.
A) Hardware
B) Software
C) End users
D) Middle ware
Answer: Option C
10. The biggest drawback of the level indicator in the classic star schema is that is
limits ............
A) flexibility
B) quantify
C) qualify
D) ability
Answer: Option A
11. Fact tables are which of the following?
A. Completely denoralized
B. Partially denoralized
C. Completely normalized
D. Partially normalized
Answer: Option C
12. Data transformation includes which of the following?
A. A process to change data from a detailed level to a summary level
B. A process to change data from a summary level to a detailed level
C. Joining data from one source into various sources of data
D. Separating data from one source into various sources of data
Answer: Option A
13. Reconciled data is which of the following?
A. Data stored in the various operational systems throughout the
organization.
B. Current data intended to be the single source for all decision support
systems.
C. Data stored in one operational system in the organization.
D. Data that has been selected and formatted for end-user support
applications.
Answer: Option B
14. ……………………. is a subject-oriented, integrated, time-variant, nonvolatile collection
or data in support of management decisions.
A. Data Mining
B. Data Warehousing
C. Document Mining
D. Text Mining
Answer: Option B
15. The data is stored, retrieved and updated in ………………..
A. OLAP
B. OLTP
C. SMTP
D. FTP
Answer: Option B
16. An ……………… system is market-oriented and is used for data analysis by knowledge
workers, including managers, executives, and analysts.
A. OLAP
B. OLTP
C. Both of the above
D. None of the above
Answer: Option A
