Author Question: For computer access, a false ________ means that a legitimate user is denied access to a resource. ... (Read 205 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?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

For a complete list of videos, visit our video library