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In DBMS architecture, what does the term 'physical data independence' refer to?

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Question: In DBMS architecture, what does the term \'physical data independence\' refer to?

Options:

  1. The ability to change the logical schema without changing the physical schema
  2. The ability to change the physical storage without affecting the logical schema
  3. The ability to access data from multiple sources
  4. The ability to enforce security measures

Correct Answer: The ability to change the physical storage without affecting the logical schema

Solution: 

Physical data independence refers to the ability to change the physical storage of data without affecting the logical schema.

In DBMS architecture, what does the term 'physical data independence' refer to?

Practice Questions

Q1
In DBMS architecture, what does the term 'physical data independence' refer to?
  1. The ability to change the logical schema without changing the physical schema
  2. The ability to change the physical storage without affecting the logical schema
  3. The ability to access data from multiple sources
  4. The ability to enforce security measures

Questions & Step-by-Step Solutions

In DBMS architecture, what does the term 'physical data independence' refer to?
Correct Answer: Physical data independence
  • Step 1: Understand that data is stored in a database in two main ways: physically and logically.
  • Step 2: The physical storage refers to how data is actually stored on the hardware (like hard drives).
  • Step 3: The logical schema refers to how data is organized and structured in the database (like tables and relationships).
  • Step 4: Physical data independence means you can change how data is stored physically (like moving it to a different hard drive) without changing how the data is organized logically.
  • Step 5: This allows database administrators to optimize storage without affecting how users interact with the data.
  • Physical Data Independence – The capability to modify the physical storage of data (like file structures or storage devices) without altering the logical structure (like tables and relationships) of the database.
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