Question 1

Consider the entity-relationship (ER) diagram shown in the exhibit. What do the characters at the ends of the connecting line indicate?

Options :

A : Degree of a relation

B : Cardinality of a relation

C : Primary key of a relation

D : Determinant of a relation

Answer: B

Question 2

Which statement is used to define a named group of related tables, views, domains and other database objects?

Options :

A : CREATE

B : CREATE TABLE

C : CREATE DOMAIN

D : CREATE SCHEMA

Answer: D

Question 3

Consider the following database information:

domain s_id: integer domain grd: fixed length

character string length 1

STUDENT_GRADE(

Student_Number: s_id NOT NULL -

Grade: grd ) Primary Key -

Student_Number -

During which phase of the database design process would this information be developed?

Options :

A : Logical

B : Physical

C : Conceptual

D : Implementation

Answer: A

Question 4

Which of the following best describes a composite key?

Options :

A : A composite key is a primary key that consists of the first two attributes of a relation

B : A composite key is a primary or foreign key defined by its parent keys.

C : A composite key is a foreign key that consists of the same attributes as the primary key from a related table.

D : A composite key is a primary or foreign key that consists of two or more attributes of a relation

Answer: D

Question 5

Consider the relation shown in the exhibit. Which of the following SQL statements would return a relation that excludes all customers with a Satisfaction_Rate of less than or equal to 80 unless the Sales_Office is located in Atlanta?

Options :

A : SELECT * FROM Customers WHERE Satisfaction_Rate > 80 OR Sales_Office = Atlanta

B : SELECT * FROM Customers WHERE Satisfaction_Rate <= 80 AND Sales_Office = Atlanta

C : SELECT * FROM Customers WHERE Satisfaction_Rate >= 80;

D : SELECT * FROM Customers WHERE Satisfaction_Rate >= 80 AND NOT Sales Office = Atlanta

Answer: A