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Author Question: The data that is stored for keeps is called persistent. Indicate whether the statement is true or ... (Read 23 times)

charchew

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on: Jul 7, 2018
The data that is stored for keeps is called persistent.
 
  Indicate whether the statement is true or false

Question 2

Explain how the relational model uses encapsulation for security purposes.
 
  What will be an ideal response?


karlss

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Reply #1 on: Jul 7, 2018
Answer to Question 1

TRUE

Answer to Question 2

Encapsulation and information hiding are the hallmarks of an object-oriented approach: an entity must offer its services through a public interface but keep its inner workings private. The advantage of the relational model over its predecessors  exposing a logical view of data instead of physical one  serves object-orientation well, but is not sufficient. Data management is not merely about data organization and maintenance, but also about data security, data integrity, enforcing business rules, and providing data-related services for various applications of the information system.


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