Author Question: An attribute that must have a value for every entity (or relationship) instance is a(n): A) ... (Read 164 times)

Kthamas

  • Hero Member
  • *****
  • Posts: 546
An attribute that must have a value for every entity (or relationship) instance is a(n):
 
  A) composite attribute.
  B) required attribute.
  C) optional attribute.
  D) multivalued attribute.

Question 2

Languages, menus, and other facilities by which users interact with the database are collectively called a(n):
 
  A) client.
  B) user interface.
  C) icon.
  D) development environment.


hanadaa

  • Sr. Member
  • ****
  • Posts: 339
Answer to Question 1

B

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

For a complete list of videos, visit our video library