Author Question: For computer access, a false ________ means that a legitimate user is denied access to a resource. ... (Read 243 times)

maegan_martin

  • Hero Member
  • *****
  • Posts: 532
For computer access, a false ________ means that a legitimate user is denied access to a resource.
 
  A) rejection
  B) acceptance
  C) Both A and B
  D) Neither A nor B

Question 2

List and explain 1st, 2nd, 3rd, BCNF, 4th, and 5th normal forms.
 
  What will be an ideal response?


Briannahope

  • Sr. Member
  • ****
  • Posts: 364
Answer to Question 1

Answer: A

Answer to Question 2

There are six different normal forms, all of which build upon each other. When a relation is in first normal form, all repeating groups have been removed. Second normal form means that any partial functional dependencies have been removed. A partial functional dependency occurs when a primary key is a composite key and a nonkey attribute is dependent upon part of the key. A relation is in third normal form when all transitive dependencies have been resolved. A transitive dependency occurs when one nonkey attribute is dependent upon another nonkey attribute. Boyce-Codd normal form removes any further dependencies that may result from anomalies. A relation is in fourth normal form when any dependencies from multivalued attributes have been removed. Fifth normal form removes any further anomalies.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

For a complete list of videos, visit our video library