Author Question: On a state diagram, an event is something that takes place at a certain point in time. Indicate ... (Read 116 times)

pragya sharda · **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.

triiciiaa · **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