Data Warehousing - Database MCQ Questions and answers- Technical Aptitude

11

The load and index is which of the following?

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

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Answer & Solution

Answer: Option B

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12

The extract process is which of the following?

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 support systems

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Answer & Solution

Answer: Option B

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13

A star schema has what type of relationship between a dimension and fact table?

A) Many-to-many B) One-to-one C) One-to-many D) All of the above

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Answer & Solution

Answer: Option C

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14

Transient data is which of the following?

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 added D) Data that are never deleted once they have been added

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Answer & Solution

Answer: Option A

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15

A multifield transformation does which of the following?

A) Converts data from one field into multiple fields B) Converts data from multiple fields into one field C) Converts data from multiple fields into multiple fields D) All of the above

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Answer & Solution

Answer: Option D

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16

A data mart is designed to optimize the performance for well-defined and predicable uses.

A) True B) False

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Answer & Solution

Answer: Option A

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17

Successful data warehousing requires that a formal program in total quality management (TQM) be implemented.

A) True B) False

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Answer & Solution

Answer: Option A

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18

Data in operational systems are typically fragmented and inconsistent.

A) True B) False

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Answer & Solution

Answer: Option A

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19

Most operational systems are based on the use of transient data.

A) True B) False

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Answer & Solution

Answer: Option A

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20

Independent data marts are often created because an organization focuses on a series of short-term business objectives.

A) True B) False

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Answer & Solution

Answer: Option A

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