Database Systems: Concepts, Design and Applications

Chapter 6 Entity-Relationship (ER) Model

State True/False

1.	False
2.	True
3.	False
4.	False
5.	False
6.	True
7.	True
8.	True
9.	True
10.	True
11.	False
12.	True
13.	True
14.	True
15.	True
16.	False
17.	True
18.	True
19.	False
20.	True
21.	True
22.	False
23.	False
24.	Fasle.

 

Tick (✓) the Appropriate Answer

1.	(c)
2.	(b)
3.	(a)
4.	(d)
5.	(d)
6.	(a)
7.	(b)
8.	(d)
9.	(b)
10.	(a)
11.	(a).

 

Fill in the Blanks

1.	P.P Chen
2.	Object, thing
3.	Association, entities
4.	Connectivity
5.	(a) entities, (b) Attributes, (c) relationships
6.	Lines
7.	Ternary relationship
8.	Recursive relationship
9.	Binary relationship
10.	Cardinality
11.	Entity, relationship
12.	Attribute or data items
13.	Entity set
14.	(a) entity sets, (b) relationship sets, (c) attributes, (d) mapping cardinalities
15.	Data (b) data organisation
16.	Strong entity type
17.	Simple ...