Data flow diagrams that concentrate on the movement of data between
processes are referred to as:
A -
data models
B -
flow charts
C -
process models
D -
flow models
4-
Entities have ____ that describe the entity’s characteristics.
A -
identifiers
B -
relationships
C -
attributes
D -
orders
5-
Entity-relationship diagram is used for
A -
Menu design
B -
System analysis
C -
Data design
D -
System design
6-
Everry true entity has a(n) ____
A -
M-to-N relationship
B -
identifier
C -
N-to-1 relationship
D -
1-to-1 relationship
7-
For a relationship to be considered a binary relationship it must satisfy which of
the following conditions?
A -
It must involve exactly two entity classes
B -
It must have a maximum cardinality of 1:1
C -
None of the others answers
D -
It must have a maximum cardinality of 1:N
8-
If an input from a source appears at level-0, it must:
A -
be connected to a data flow
B -
be connected to a data store
C -
appear on the connected to sink
D -
appear on the context diagram
9-
If order number serves as the primary key in the ORDER relation and also
appears as a nonprimary key attribute in the INVOICE relation, then order number is said
to be a:
A -
candidate key
B -
pointer
C -
relationship key
D -
foreign key
10-
If STUDENT and COUSE participate in a relationship, their relationship is
a(n):
