Data Mining and Business Intelligence MCQs with answers Page - 4

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Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

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

A

Admin • 828.03K Points
Coach

Q. The load and index 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

A

Admin • 828.03K Points
Coach

Q. Data transformation includes___________.

  • (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

A

Admin • 828.03K Points
Coach

Q. ______ is called a multifield transformation.

  • (A) Converting data from one field into multiple fields
  • (B) Converting data from fields into field
  • (C) Converting data from double fields into multiple fields
  • (D) Converting data from one field to one field

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