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Relational schemas and other metadata about relations are stored in a structure called the ____________

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Relational schemas and other metadata about relations are stored in a structure called the ____________

(a) Metadata

(b) Catalog

(c) Log

(d) Data Dictionary

This question was addressed to me during an interview.

This intriguing question comes from Data-Dictionary Storage in chapter Storage and File Structures of Database Management

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Best answer
The correct choice is (d) Data Dictionary

Easiest explanation - Data dictionary is also called as system catalog.

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