Question: Which statement is correct? a. A star schema has one large central dimension table which is connected to various smaller fact tables. b. The dimension

Which statement is correct?

a. A star schema has one large central dimension table which is connected to various smaller fact tables.

b. The dimension tables of a star schema contain the criteria for aggregating the measurement data and will typically be used as constraints to answer queries.

c. To speed up report generation and avoid time-consuming joins in a star schema, the dimension tables need to be normalized.

d. The dimension tables in a star schema are frequently updated.

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