What is logical data independence and why is it important?

Explain the difference between logical and physical data independence.

Explain the difference between external, internal, and conceptual schemas. How are these different schema layers related to the concepts of logical and physical data independence?

What are the responsibilities of a DBA?

Distinguish between logical and physical database design.

Describe and define the key properties of a database system. Give an organizational example of the benefits of each property.