« previous next »

Author Question: The data that is stored for keeps is called persistent. Indicate whether the statement is true or ... (Read 55 times)

charchew

  • Hero Member
  • *****
  • Posts: 579
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

  • Sr. Member
  • ****
  • Posts: 321
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Herniated disk. A herniated disk is a protrusion of the disk’s gelatinous center, called the nucleus Herniated disk. A herniated disk is a protrusion of the disk’s gelatinous center, called the nucleus
Data from more than 22,000 men over the age of 40, showing the relationship between birth weight and ... Data from more than 22,000 men over the age of 40, showing the relationship between birth weight and ...
Snap-ring pliers are also called lock-ring pliers, and they are designed to remove internal and ... Snap-ring pliers are also called lock-ring pliers, and they are designed to remove internal and ...
A resonance tube, called a Helmholtz resonator, is used on the intake duct between the air filter ... A resonance tube, called a Helmholtz resonator, is used on the intake duct between the air filter ...
Inferring Productivity from Data on Output and Factor Accumulation Inferring Productivity from Data on Output and Factor Accumulation
Business Intelligence, Analytics, and Data Science: A Managerial Perspective, 4th Edition Business Intelligence, Analytics, and Data Science: A Managerial Perspective, 4th Edition
Video: Chromosome structural organization/ Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library