Top 250+ Solved Data Mining and Business Intelligence MCQ Questions Answer
Q. is concerned with discovering the model underlying the link structures of the web.
a. Web content mining.
b. Web structure mining.
c. Web usage mining.
d. All of the above
Q. The__________engine for a data warehouse supports query-triggered usage of data.
a. NNTP
b. SMTP
c. OLAP
d. POP
Q. displays of data such as maps, charts and other graphical representation allow datato be presented compactly to the users.
a. Hidden
b. Visual
c. Obscure
d. D Concealed
Q. Detail data in single fact table is otherwise known as__________.
a. Monoatomic data
b. Diatomic data
c. Atomic data
d. Multiatomic data
Q. ______test is used in an online transactional processing environment.
a. MEGA
b. MICRO
c. MACRO
d. ACID
Q. ______is a good alternative to the star schema.
a. Star schema
b. Snowflake schema
c. Fact constellation
d. Star-snowflake schema
Q. The biggest drawback of the level indicator in the classic star-schema is thatitlimits_________.
a. Quantify
b. Qualify
c. Flexibility
d. Ability
Q. A data warehouse is__________.
a. Updated by end users
b. Contains numerous naming conventions and formats
c. Organized around important subject areas
d. Contains only current data
Q. An operational system is________.
a. Used to run the business in real time and is based on historical data
b. Used to run the business in real time and is based on current data
c. Used to support decision making and is based on current data
d. Used to support decision making and is based on historical data
Q. The generic two-level data warehouse architecture includes________.
a. At least one data mart
b. Data that can extracted from numerous internal and external sources
c. Near real-time updates
d. Far real-time updates
Q. The active data warehouse architecture includes _________.
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
Q. Reconciled data is_________.
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
Q. Transient data is___________.
a. Data in which changes to existing records cause the previous version of the records to be eliminated
b. Data in which changes to existing records do not cause the previous version of the records to be eliminated
c. Data that are never altered or deleted once they have been adde
d. D Data that are never deleted once they have been added
Q. The extract process is __________.
a. Capturing all of the data contained in various operational systems
b. Capturing a subset of the data contained in various operational systems
c. Capturing all of the data contained in various decision support systems
d. Capturing a subset of the data contained in various decision supportsystems
Q. Data scrubbing is___________.
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