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QWhat are the three layers of information stored in a database?

ID: #13448 Database Concepts MCQs 100 views
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#13448Q ID
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Database Concepts MCQsTopic
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  • A Data, structure, and semantics ✔ ✖
  • B Metadata, indexes, and query results ✔ ✖
  • C Tables, columns, and records ✔ ✖
  • D Primary keys, foreign keys, and constraints ✔ ✖
Correct Answer: Option A

Explanation

A database contains three layers of information that need to be stored: the data itself, the database structure (tables, columns, relationships), and the semantics (meaning) associated with the data and structure.
Storing all three layers is essential for the preservation and longevity of the database.

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