Author Question: For computer access, a false ________ means that a legitimate user is denied access to a resource. ... (Read 237 times)

maegan_martin

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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

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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.



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