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Author Question: On a state diagram, an event is something that takes place at a certain point in time. Indicate ... (Read 112 times)

pragya sharda

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on: Jul 7, 2018
On a state diagram, an event is something that takes place at a certain point in time.
 
  Indicate whether the statement is true or false

Question 2

An attribute that appears as a nonkey attribute in one relation and as a primary key attribute (or part of a primary key) in another relation is a:
 
  A) foreign key.
  B) candidate key.
  C) pointer.
  D) relationship key.
  E) marker.


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triiciiaa

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Reply #1 on: Jul 7, 2018
Answer to Question 1

TRUE
Explanation: A state is a condition during the life of an object during which it satisfies some condition(s), performs some action(s), or waits for some event(s).
CL

Answer to Question 2

A
Explanation: A) For instance, in a CUSTOMER, ORDER relationship, the primary key of CUSTOMER is placed as a foreign key ORDER.
CL


pragya sharda

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Reply 2 on: Jul 7, 2018
Gracias!

ktidd

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Reply 3 on: Yesterday
Excellent

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