Author Question: Which of the following is not true of database recovery through reprocessing? A) Reprocessing ... (Read 153 times)

nummyann

  • Hero Member
  • *****
  • Posts: 576
Which of the following is not true of database recovery through reprocessing?
 
  A) Reprocessing makes use of a database save.
  B) Reprocessing takes the same amount of time as did processing in the first place.
  C) Reprocessing will always return the database to its exact previous state.
  D) Reprocessing requires a record of all transactions since the last time the database was saved.
  E) All of the above are true of reprocessing.

Question 2

Which of the following is true about identifiers of entities?
 
  A) Identifiers must be unique.
  B) Identifiers are not normally used in a naming role.
  C) The value of an identifier may identify a set of entity instances.
  D) Identifiers may not be more than two attributes.
  E) An identifier in the E-R model is equivalent to a key in the relational model.



sierrahalpin

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

C

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

For a complete list of videos, visit our video library