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Jkader Jkader
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Posts: 498
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6 years ago
What percent of the Fortune 500 companies uses Twitter to communicate with their customers?
 
  A) 20 percent
  B) 40 percent
  C) 50 percent
  D) 60 percent
  E) 80 percent

 Q. 2

What is the difference between an entity type and an entity instance?
 
  What will be an ideal response?

 Q. 3

In 1998, ANSI/SPARC published an important document describing the three-schema architecture.
 
  Indicate whether the statement is true or false

 Q. 4

DCL is used to update the database with new records.
 
  Indicate whether the statement is true or false

 Q. 5

An identifier assigned to an associative entity is also called a cross-relation key.
 
  Indicate whether the statement is true or false

 Q. 6

Approximately how many adult Americans are online?
 
  A) 118 million
  B) 170 million
  C) 205 million
  D) 220 million
  E) 227 million

 Q. 7

Business rules logic includes such activities as data validation and identification of processing errors.
 
  Indicate whether the statement is true or false
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1 Reply

Related Topics

Replies
wrote...
6 years ago
Ans. to #1

E

Ans. to #2

An entity type is a collection of entities that share common properties. An entity instance is a single occurrence of an entity type. So, for example, STUDENT is an entity type and John Smith is an entity instance.

Ans. to #3

FALSE

Ans. to #4

FALSE

Ans. to #5

FALSE

Ans. to #6

E

Ans. to #7

FALSE
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