Question 1:
The entity integrity rule states that:
A.
no primary key attribute may be null.
B.
no primary key can be composite.
C.
no primary key may be unique.
D.
no primary key may be equal to a value in a foreign key.
Answer: _________
Question 2:
When mapping a many-to-many unary relationship into a relation which of the following is true?
A.
One relation is created.
B.
Two relations are created.
C.
Three relations are created.
D.
Four relations are created.
Answer: _________
Question 3:
If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
A.
First normal form
B.
Second normal form
C.
Third normal form
D.
Fourth normal form
Answer: _________
Question 4:
A foreign key is which of the following?
A.
Any attribute
B.
The same thing as a primary key
C.
An attribute that serves as the primary key of another relation
D.
An attribute that serves no purpose
Answer: _________
Question 5:
A transitive dependency is which of the following?
A.
A functional dependency between two or more key attributes.
B.
A functional dependency between two or more nonkey attributes.
C.
A relation that is in first normal form.
D.
A relation that is in second normal form.
Answer: _________
Question 6:
When mapping a multivalued attribute into a relation which of the following is true?
A.
One relation is created.
B.
Two relations are created.
C.
Three relations are created.
D.
Four relations are created.
Answer: _________
Question 7:
If no multivalued attributes exist in a relation, then the relation is in what normal form?
A.
First normal form
B.
Second normal form
C.
Third normal form
D.
Fourth normal form
Answer: _________
Question 8:
A primary key is which of the following?
A.
Any attribute
B.
An attribute that uniquely identifies each row
C.
An attribute that uniquely identifies each column
D.
A derived attribute
Answer: _________
Question 9:
The relational model consists of:
A.
data in the form of tables.
B.
data redundancy.
C.
operations using non-SQL languages.
D.
unorganized data.
Answer: _________
Question 10:
When mapping a binary many-to-many relationship into a relation which of the following is true?
A.
One relation is created.
B.
Two relations are created.
C.
Three relations are created.
D.
Four relations are created.
Answer: _________
Question 11:
A relation has which of the following properties?
A.
Each row is not unique.
B.
Attributes can have the same name within a given table.
C.
Each relation has a unique name.
D.
The order of the columns is significant.
Answer: _________
Question 12:
When mapping a ternary relationship with an associative entity into a relation which of the following is true?
A.
One relation is created.
B.
Two relations are created.
C.
Three relations are created.
D.
Four relations are created.
Answer: _________
Question 13:
When mapping a regular entity into a relation which of the following is true?
A.
One relation is created.
B.
Two relations are created.
C.
Three relations are created.
D.
Four relations are created.
Answer: _________
Question 14:
When mapping a supertype/subtype relationship which of the following is true?
A.
The supertype primary key is assigned to each subtype.
B.
The subtype primary key is assigned to each supertype.
C.
There is no link between the supertype/subtype entities.
D.
There is no primary key/foreign key relationship between a supertype/subtype.
Answer: _________
Question 15:
Relations are:
A.
two-dimensional tables.
B.
three-dimensional tables.
C.
four-dimensional tables.
D.
five-dimensional tables.
Answer: _________
Question 16:
An enterprise key is a primary key whose value is unique for a given relation.
A.
True
B.
False
Answer: _________
Question 17:
A composite attribute does not get mapped into a relation.
A.
True
B.
False
Answer: _________
Question 18:
A relation is a two-dimensional table.
A.
True
B.
False
Answer: _________
Question 19:
Weak entities do not get mapped into a relation.
A.
True
B.
False
Answer: _________
Question 20:
A primary key may be null.
A.
True
B.
False
Answer: _________
Question 21:
A null value is assigned when no other value applies.
A.
True
B.
False
Answer: _________
Question 22:
A synonym is two or more attributes that have different names but the same meaning.
A.
True
B.
False
Answer: _________
Question 23:
The primary key in a relation does not need to be underlined.
A.
True
B.
False
Answer: _________
Question 24:
In a 1:M relationship, the primary key on the one side migrates to the many side to become the foreign key on the many side.
A.
True
B.
False
Answer: _________
Question 25:
Normalization is a formal process for deciding which attributes should be grouped together in a relation.
A.
True
B.
False
Answer: _________
Question 26:
A candidate key must uniquely identify each row.
A.
True
B.
False
Answer: _________
Question 27:
Well-structured relations encourage anomalies of data.
A.
True
B.
False
Answer: _________
Question 28:
A foreign key may be null and still adhere to the referential integrity constraint.
A.
True
B.
False
Answer: _________
Question 29:
If a relation is in third normal form, it does not need to be in second normal form.
A.
True
B.
False
Answer: _________
Question 30:
The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities.
A.
True
B.
False
Answer: _________
Answer Key
1:
A
2:
B
3:
B
4:
C
5:
B
6:
B
7:
B
8:
B
9:
A
10:
C
11:
C
12:
D
13:
A
14:
A
15:
A
16:
B
17:
A
18:
A
19:
B
20:
B
21:
A
22:
A
23:
B
24:
A
25:
A
26:
A
27:
B
28:
A
29:
B
30:
A