DBMS · Question 26 · Medium
DBMS question 26
Changing the internal storage of a database, for example adding an index or moving tables to new disks, without having to change the conceptual (logical) schema is called:
- Logical data independence
- Physical data independence
- Referential integrity
- Data redundancy
Answer and explanation
Answer: B. Physical data independence
Explanation: Physical data independence separates the internal level from the conceptual level of the three-schema architecture. Logical data independence is the harder property of changing the conceptual schema without changing external views.
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