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Question

Which of the following is a key characteristic of a STAR schema used in data design for data warehouses?

a.

It employs entity-relationship modeling techniques.

b.

It contains only fact tables with no dimension tables.

c.

It lacks any hierarchy within the dimension tables.

d.

It contains both fact tables and dimension tables, facilitating drill down and roll up.

Answer: (d).It contains both fact tables and dimension tables, facilitating drill down and roll up. Explanation:STAR schema in data design for data warehouses consists of both fact tables and dimension tables, enabling drill down, roll up, and efficient query processing.

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Q. Which of the following is a key characteristic of a STAR schema used in data design for data warehouses?

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